Most Recent Weekly Report: 25 June-1 July 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 25 June-1 July. Daily dense gray ash plumes rose 200-600 m above the summit and drifted NE, E, and SE. Nighttime crater incandescence was visible in some webcam images. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

Most Recent Bulletin Report: December 2023 (BGVN 48:12) Cite this Report

Weekly Reports - Index

2025: January | February | March | April | May | June
2024: January | February | March | April | May | June | July | August | September | October | November | December
2023: January | February | March | April | May | July | August | September | October | November | December
2022: February | March | April | May | June | July | August | September | October | November | December
2021: January | February | March | April | May | June | August | September | October | November | December
2020: January | February | March | April | May | June | July | August | September | October | November | December
2019: February | March | April | May | June | July | August | September | October | November | December
2018: March | April | May | June | July | August | September | October | November | December
2017: January | March | April | May | June | August
2016: March | August
2015: November
2013: June | December
2011: September
2009: July | August
2008: April

25 June-1 July 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 25 June-1 July. Daily dense gray ash plumes rose 200-600 m above the summit and drifted NE, E, and SE. Nighttime crater incandescence was visible in some webcam images. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

18 June-24 June 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 18-24 June. Gray or white-to-gray ash plumes rose 300-800 m above the summit and drifted in multiple directions on most days; eruptive events were recorded on 18 June, but visual observations were obscured by weather clouds. Nighttime crater incandescence was visible in some webcam images. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

11 June-17 June 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 11-17 June. Daily gray or white-to-gray ash plumes rose 300-700 m above the summit and drifted in all directions throughout the week, but primarily to the SW and S. Nighttime crater incandescence was visible in some webcam images. Weather clouds sometimes obscured views. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

4 June-10 June 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 4-10 June. Daily gray or white-to-gray ash plumes rose 300-700 m above the summit and drifted NE, E, and SE. Nighttime crater incandescence was visible in some webcam images. Weather clouds sometimes obscured views. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

28 May-3 June 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 28 May-3 June. Daily gray or white-to-brown ash plumes rose as high as 1 km above the summit and drifted S, SW, NW, and NE. Nighttime crater incandescence was visible in some webcam images. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

14 May-20 May 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 14-20 May. Daily gray, white-to-gray, or white-to-brown ash plumes rose as high as 1 km above the summit and drifted in various directions. Nighttime crater incandescence was visible in some webcam images. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

7 May-13 May 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 7-13 May. Daily gray, white-to-gray, or white-to-brown ash plumes rose 300-800 m above the summit and drifted in various directions. Nighttime crater incandescence was visible in some webcam images. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

30 April-6 May 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) lowered the Alert Level for Ibu to 2 (the second lowest level on a four-level scale) at 1700 on 1 May, based on visual observations and monitoring data that showed decreasing activity since February. Eruptive activity continued to be recorded, though plumes heights were lower and incandescent material was ejected only as far as 200 m from the crater rim. Seismic activity had decreased, and deformation data showed some signs of decreased pressure, or deflation. Daily gray, white-to-gray, or white-to-brown ash plumes rose 300-700 m above the crater rim and drifted in variable directions. Nighttime crater incandescence was visible in some webcam images. The public was advised to stay 2 km away from the active crater and 3.5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

23 April-29 April 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 23-29 April. Dense gray ash plumes rose 400-700 m above the summit and drifted E and NE on most days. Eruptive events were recorded by the seismicity network on 24 and 26 April, though weather conditions prevented visual observations. Nighttime crater incandescence was visible in some webcam images. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

16 April-22 April 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 16-22 April. Daily dense gray ash plumes rose 300-600 m above the summit and drifted in multiple directions. Nighttime crater incandescence was visible in a webcam images on 16, 18, and 21 April. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

9 April-15 April 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 9-15 April. Daily dense gray ash plumes rose 300-700 m above the summit and drifted in multiple directions. Nighttime crater incandescence was visible in a webcam image on 15 April. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

2 April-8 April 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 2-7 April. Daily dense gray ash plumes rose 300-1,000 m above the summit and drifted in multiple directions. Incandescence at the summit was visible in several webcam images posted with the reports. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

26 March-1 April 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 26 March-1 April. Daily dense gray ash plumes rose 300-1,200 m above the summit and drifted in multiple directions. Incandescence at the summit was visible in several webcam images posted with the reports. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

19 March-25 March 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 12-18 March. Eruptive events were recorded daily though weather conditions sometimes obscured views. Dense gray ash plumes rose 300-700 m above the summit and drifted SW, NW, and E during 19-21 and 24 March. Incandescence at the summit was visible in a few webcam images posted with the reports. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

12 March-18 March 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 12-18 March. Multiple daily dense gray ash plumes rose as high as 1.2 km above the summit and drifted in multiple directions. Very minor incandescence at the summit was visible in a few webcam images posted with the reports. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

5 March-11 March 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 5-11 March. Multiple daily gray or white-and-gray ash plumes that were often dense rose as high as 1.5 km above the summit and drifted mainly NW, W, and SW. Minor incandescence at the summit was visible in some webcam images posted with the reports. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

26 February-4 March 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 19-25 February. Multiple daily gray, white-and-gray, or gray-to-brown ash plumes that were often dense rose as high as 1.5 km above the summit and drifted in multiple directions. Incandescence at the summit was visible in some webcam images posted with the reports. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

19 February-25 February 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 19-25 February. Multiple daily gray or white-and-gray ash plumes that were often dense rose as high as 1.5 km above the summit and drifted mainly in multiple directions. Incandescence at the summit was visible in some webcam images posted with the reports. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

12 February-18 February 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 12-18 February. Multiple daily gray or white-and-gray ash plumes that were often dense rose as high as 1.5 km above the summit and drifted mainly in multiple directions. Incandescence at the summit was visible in some webcam images posted with the reports. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

5 February-11 February 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 5-11 February. Multiple daily gray or white-and-gray ash plumes that were often dense rose as high as 1.2 km above the summit and drifted mainly SE and S. Incandescence at the summit was visible in some webcam images posted with the reports. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

29 January-4 February 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 29 January-4 February. Multiple daily gray or white-and-gray ash plumes that were often dense rose as high as 1.5 km above the summit and drifted mainly NW, W, SW, and S. Webcam images posted with the reports often showed incandescence at the summit. On 29 January BNPB reported that evacuees will start returning to their homes due to the decrease in the exclusion zone announced the previous day. As many as 541 families, or 1,425 people, that were spread across nine evacuation centers will return home after officials check for safe conditions and that basic needs will be met. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Badan Nacional Penanggulangan Bencana (BNPB)

22 January-28 January 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 22-28 January, with a decrease in eruptive activity resulting in the Alert Level being lowered from Level 4 to Level 3 (on a scale of 1 to 4) at 1700 on 28 January. Additionally, the recommended exclusion zone was adjusted in response to the new Alert Level status, with the public now advised to maintain a distance of at least 4 km from the eruption center, except in the N sector, where the distance extends to 5 km from the N crater wall opening. Eruptive events were recorded daily, generating gray and white-to-gray ash plumes that rose at least 1.2 km above the summit and drifted multiple directions. Webcam images posted with the eruption reports showed incandescence at the summit and occasionally incandescent material being ejected above the summit during explosions. In a special report, PVMBG noted that the lava dome growing in the crater had exceeded the crater wall height, resulting in small collapse avalanches onto the N and NW flanks. Deformation monitoring data (Electronic Distance Measurement surveys) showed a deflationary trend between 1 and 27 January.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

15 January-21 January 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 16-22 January. Daily gray or white-and-gray ash plumes that were often dense rose as high as 1.5 km above the summit and drifted mainly NW, W, and SW. Webcam images posted with the reports often showed incandescence at the summit or being ejected above the summit of the inner active cone.

BNPB reported that following the increase in the Alert Level to the highest level the government issued a decree leading to the coordination of an emergency response and a task force, and that would be in effect for a two-week period. An emergency response team implemented the evacuation of resident in five villages that were deemed at a higher risk for impacts from the eruption. A total of 221 people were evacuated during 16-17 January, though more than 3,000 people were in higher risk locations; on 16 January residents were evacuated from Sangaji Nyeku, the closest village to the summit at 3.7 km, and on 17 January residents were evacuated from the villages of Sosangaji, Tuguis, Togoreba Sungi, Borona, and Todoke. Farmers harvesting nutmeg will be allowed to return to their gardens during daytime hours. According to a news report about 644 people had evacuated by 20 January. The Alert Level remained at 4 (the highest level on a four-level scale) and the public was advised to stay 5 km away from the active crater and 6 km away from the N crater wall opening.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Badan Nacional Penanggulangan Bencana (BNPB); Antara News; Antara News

8 January-14 January 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 8-15 January. Daily gray or white-and-gray ash plumes that were often dense generally rose as high as 2.5 km above the summit and drifted in multiple directions, though ash plumes occasionally rose higher. Webcam images posted with the reports often showed incandescence at the summit or being ejected above the summit of the inner active cone. During 10 and 13-14 January ash plumes rose up to 3 km above the summit. At 1935 on 11 January a dense gray ash plume rose 4 km above the summit and drifted W and, according to BNPB, incandescent lava was ejected as high as 2 km above the summit. The event lasted for three minutes and five seconds based on seismic data. At 0711 on 15 January a dense ash plume rose 4 km above the summit and drifted W and a pyroclastic flow traveled 500 m N. Booming and rumbling sounds were heard at the Ibu Observation Post (9 km W).

In a press release PVMBG noted that taller ash plumes, 3-4 km above the summit, had become more frequent during 1-15 January. Additionally, the number of shallow volcanic earthquakes increased, and deformation data showed inflation on 6 and 13 January. The Alert Level was raised to 4 (the highest level on a four-level scale) at 1000 on 15 January and the public was advised to stay 5 km away from the active crater and 6 km away from the N crater wall opening.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Badan Nacional Penanggulangan Bencana (BNPB)

1 January-7 January 2025 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 1-7 January. Daily gray or white-and-gray ash plumes that were often dense rose as high as 3 km above the summit and drifted in multiple directions. Webcam images posted with some of the reports showed incandescence at the summit or being ejected above the summit of the inner active cone. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5.5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

25 December-31 December 2024 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 18-31 December. Daily gray or white-and-gray ash plumes that were often dense generally rose 100-800 m above the summit and drifted in multiple directions. On occasion dense plumes rose higher: at 0600 on 19 December an ash plume rose 1.5 km above the crater and drifted E; at 2310 on 20 December an ash plume rose 2.5 km above the crater rim and drifted NE; at 1711 and 1835 on 22 December ash plumes rose 1.2 and 2.5 km above the crater rim, respectively, and drifted NE and E; at 1032 on 24 December an ash plume rose 2 km above the crater rim and drifted SE and E; at 1258 on 25 December an ash plume rose 1.5 km above the crater rim and drifted SE; and at 2105 on 29 December and at 0518 on 31 December ash plumes rose 3 km above the crater rim and drifted NE, E and SE. Webcam images posted with some of the reports showed incandescence at the summit or being ejected above the summit of the inner active cone. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5.5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

11 December-17 December 2024 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 11-17 December. Gray or white-and-gray ash plumes that were often dense rose 0.3-1.2 km above the summit and drifted in multiple directions on most days; emissions were not reported on 15 December likely due to weather clouds. Webcam images posted with 11 December reports showed incandescence at the summit of the inner active cone. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5.5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

4 December-10 December 2024 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 4-10 December. Daily gray or white-and-gray ash plumes that were often dense rose as high as 1.2 km above the summit and drifted NE, SE, and SW. Webcam images posted with the reports showed incandescence at the summit of the inner active cone. the public was advised to stay 4 km away from the active crater in all other directions. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5.5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

27 November-3 December 2024 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 27 November-3 December. Daily gray or white-and-gray ash plumes that were often dense rose as high as 1.2 km above the summit and drifted in multiple directions. Daily webcam images posted with the reports showed incandescence at the summit of the inner active cone. According to BNPB an eruptive event at 2144 on 1 December ejected incandescent material 700 m above the summit and lasted about two and a half minutes based on seismic data. The event prompted PVMBG to increase the hazard zone radius to 5.5 km on the N flank; the public was advised to stay 4 km away from the active crater in all other directions. The Alert Level remained at 3 (the second highest level on a four-level scale).

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Badan Nacional Penanggulangan Bencana (BNPB)

20 November-26 November 2024 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 20-26 November. Daily gray or white-and-gray ash plumes that were often dense rose as high as 1.2 km above the summit and drifted mainly SW, W, and NW. Daily webcam images posted with the reports showed incandescence at the summit of the inner active cone. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

13 November-19 November 2024 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that activity at Ibu continued during 13-19 November. Daily gray or white-and-gray ash plumes that were often dense rose as high as 3 km above the summit and drifted in multiple directions. Some webcam images posted with the reports showed incandescence visible above the crater rim. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

6 November-12 November 2024 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that activity at Ibu continued during 6-12 November. Daily gray or white-and-gray ash plumes that were often dense rose 0.5-1 km above the summit and drifted in multiple directions. Most of the webcam images posted with the reports showed incandescence visible above the crater rim. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

30 October-5 November 2024 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that explosive activity continued at Ibu during 30 October-5 November. Emissions were observed daily; white plumes rose as high as 300 m above the summit and ash plumes produced by explosion events rose as high as 800 m above the summit. Seismicity included harmonic tremor episodes, volcanic earthquakes, rockfall events, frequent gas emission signals, tornillo earthquakes, and 67-101 daily explosion events. The Alert Level remained at 3 (the third level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

23 October-29 October 2024 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that activity at Ibu continued during 23-29 October. Daily gray or white-and-gray ash plumes that were often dense rose 0.3-2 km above the summit and drifted W, NW, and NE. Some of the webcam images posted with the reports showed incandescence visible above the crater rim. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

16 October-22 October 2024 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that activity at Ibu continued during 17-22 October. Near daily gray or white-and-gray ash plumes that were sometimes dense generally rose 500-1,500 m above the summit and drifted NE and E; a gray ash plume rose 4 km above the summit and drifted N and NE at 0126 on 16 October and another one rose 3 km above the summit and drifted NE and E at 2315 on 17 October. Nighttime incandescence was visible in a webcam image taken on 16 October. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

9 October-15 October 2024 Cite this Report

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that activity at Ibu continued during 9-16 October. Daily gray or white-and-gray ash plumes that were sometimes dense generally rose 0.1-2 km above the summit and drifted NW, W, and SW; only white plumes were visible rising 100-200 m and drifting NE, SW, and W on 12 October. Some of the webcam images posted with the reports showed incandescence visible above the crater rim. At 0126 on 16 October an ash plume rose 4 km above the summit and drifted N and NE. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

2 October-8 October 2024 Cite this Report

Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that activity at Ibu continued during 2-8 October. Gray or white-and-gray ash plumes that were sometimes dense rose 0.5-1 km above the summit and drifted NE, NW, W, and SW during 2-5 October. Webcam images posted with the reports during 3-4 October showed incandescence visible above the crater rim. One eruptive event was recorded on 7 October, although emissions were not observed. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

25 September-1 October 2024 Cite this Report

Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that activity at Ibu continued during 25 September-1 October with multiple daily eruptive events. Daily gray or white-and-gray ash plumes that were sometimes dense rose as high as 1.5 km above the summit and drifted in multiple directions. Webcam images posted with the reports showed incandescence visible above the crater rim. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

18 September-24 September 2024 Cite this Report

Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that activity at Ibu continued during 18-24 September with multiple eruptive events recorded daily. Daily gray or white-and-gray ash plumes that were sometimes dense rose as high as 1.5 km above the summit and drifted in multiple directions. Webcam images posted with the reports showed incandescence visible above the crater rim. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

11 September-17 September 2024 Cite this Report

PVMBG reported that activity at Ibu continued during 11-17 September with multiple eruptive events recorded daily. On most days gray or white-and-gray ash plumes that were sometimes dense rose as high as 1.5 km above the summit and drifted in multiple directions. Two eruptive events were recorded on 14 September, though no emissions were visible. Some webcam images posted with the reports showed incandescence visible above the crater rim. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

4 September-10 September 2024 Cite this Report

PVMBG reported that activity at Ibu continued during 4-10 September with multiple eruptive events recorded daily. Daily gray or white-and-gray ash plumes that were sometimes dense generally rose as high as 1.5 km above the summit and drifted in multiple directions. At 1756 on 7 September a dense gray ash plume rose as high as 4 km above the crater rim and drifted W. Some webcam images posted with the reports showed incandescence visible above the crater rim. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

28 August-3 September 2024 Cite this Report

PVMBG reported that activity at Ibu continued during 28 August-3 September with multiple eruptive events recorded daily. Daily gray or white-and-gray ash plumes that were sometimes dense generally rose as high as 1.5 km above the summit and drifted in multiple directions. Some webcam images posted with the reports showed incandescence visible above the crater rim. At 0118 on 28 August a dense gray-to-black ash plume rose as high as 5 km above the crater rim and drifted SW and W. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

21 August-27 August 2024 Cite this Report

PVMBG reported that activity at Ibu continued during 14-20 August with multiple eruptive events recorded daily. Daily gray or white-and-gray ash plumes that were sometimes dense generally rose as high as 2 km above the summit and drifted N, NW, W, and SW. Some webcam images posted with the reports showed incandescence emanating above the crater rim, possibly reflected in the emissions. At 0118 on 28 August a dense gray-to-black ash plume rose as high as 5 km above the crater rim and drifted SW and W. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

14 August-20 August 2024 Cite this Report

PVMBG reported that activity at Ibu continued during 14-20 August with multiple eruptive events recorded daily. Daily gray or white-and-gray ash plumes that were sometimes dense rose as high as 1.5 km above the summit and drifted N, NW, W, and SW. Some webcam images posted with the reports showed incandescence emanating above the crater rim, possibly reflected in the emissions. At 0252 an ash plume rose as high as 5 km above the crater rim and drifted W. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

7 August-13 August 2024 Cite this Report

PVMBG reported that activity at Ibu continued during 7-13 August and multiple eruptive events were recorded daily. Gray or white-and-gray ash plumes that were sometimes dense rose as high as 1 km above the summit and drifted in multiple directions on most days; weather conditions occasionally obscured views, especially on 8 August. Daily webcam images posted with the reports showed incandescence emanating above the crater rim, possibly reflected in the emissions. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

31 July-6 August 2024 Cite this Report

Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that explosive activity continued at Ibu during 31 July-6 August. Emissions were observed daily; white plumes rose as high as 700 m above the summit and gray plumes produced by explosion events rose as high as 1.5 km above the summit. Seismicity included harmonic tremor episodes, volcanic earthquakes, frequent gas emission signals, and 43-108 daily explosion events. Ashfall was reported at the Ibu Volcano Observation Post (9 km W) on 6 August. The Alert Level remained at 3 (the third level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

24 July-30 July 2024 Cite this Report

PVMBG reported that activity at Ibu continued during 24-30 July. Daily white-and-gray ash plumes rose as high as 2.1 km above the summit and drifted in multiple directions. Eruptive events were occasionally not observable. Daily webcam images posted with the reports showed incandescence emanating above the crater rim, possibly reflected in the emissions. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

17 July-23 July 2024 Cite this Report

PVMBG reported that activity at Ibu continued during 17-23 July. Daily white-and-gray or white, gray, and black ash plumes rose 100-1,200 m above the summit and drifted in multiple directions. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

10 July-16 July 2024 Cite this Report

Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported continuing activity at Ibu during 10-16 July. Emissions were observed daily; white and gray, gray, and sometimes gray-to-black plumes rose as high as 2 km above the summit. Seismicity included harmonic tremor episodes, frequent gas emission signals, and 2-52 daily explosion events. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

3 July-9 July 2024 Cite this Report

PVMBG reported that activity at Ibu continued during 3-9 July. Daily white-and-gray or white, gray, and black ash plumes rose as high as 5 km above the summit and drifted in multiple directions. The ash plumes rose 3-4 km above the summit during 3-5 July and as high as 1.2 km during 6-9 July. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

26 June-2 July 2024 Cite this Report

PVMBG reported that activity at Ibu continued during 26 June-2 July. Daily white-and-gray or white, gray, and black ash plumes rose as high as 5 km above the summit and drifted in multiple directions, though notably on 28 June ash plumes rose as high as 7 km above the summit. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

19 June-25 June 2024 Cite this Report

PVMBG reported decreasing activity at Ibu. Both the number of earthquakes and the height of ash plumes began to decline on 15 June. In addition, the distances of ejected incandescent material also shortened to a radius of 1 km. White, gray, and black ash plumes rose 100-3,000 m above the summit and drifted in multiple directions during 19-21 June. Because of the decreasing activity PVMBG lowered the Alert Level to 3 (the second highest level on a four-level scale) at 1032 on 21 June and advised the public to stay 4 km away from the active crater and 5 km away from the N crater wall opening. On 22 June white-and-gray ash plumes rose as high as 3 km and drifted NW, W, and SW, and on 23 June ash plumes rose as high as 5 km and drifted NW, W, and SW. On 24 June white plumes rose 1 km and drifted W and NW and on 25 June white-and-gray ash plumes rose 400 m and drifted NE, E, and W.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

12 June-18 June 2024 Cite this Report

PVMBG reported that the eruption at Ibu continued during 12-17 June with occurrences of tall ash plumes. Daily white, gray, brown, and black ash plumes rose as high as 5 km above the crater rim and drifted in multiple directions. The Alert Level remained at 4 (the highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 7 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

5 June-11 June 2024 Cite this Report

PVMBG reported that the eruption at Ibu continued during 5-11 June with occurrences of tall ash plumes. White, gray, and black ash plumes rose as high as 5 km above the crater rim and drifted in multiple directions during 5-6 and 9 June. White steam-and-gas plumes rose 200-1,000 m above the crater rim and drifted in multiple directions during on 29 May and 3 June. White-and-gray ash plumes rose as high as 4 km and drifted in multiple directions on 11 June. The Alert Level remained at 4 (the highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 7 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

29 May-4 June 2024 Cite this Report

PVMBG reported that the eruption at Ibu continued during 22-28 May. White steam-and-gas plumes rose 200-600 m above the crater rim and drifted in multiple directions during on 29 May and 3 June. White-and-gray ash plumes rose 200-800 m and drifted in multiple directions during 30-31 May and 3 June. Taller plumes were visible during 1-2 June. At 0323 on 1 June a dense gray-to-black ash plume rose 6 km above the summit and drifted SW and at 1103 on that same day a dense gray plume rose 5 km and drifted SW. A 10-minute-long eruption that began at 1235 on 2 June produced a dense gray-to-black ash plume that rose 7 km above the summit and drifted W. BNPB noted that tephra fell in areas to the W including at the Ibu observation post (9 km W) and in Gam Ici (8.5 km W). At 0303 on 27 May an eruptive event produced a white, gray, and black ash plume that rose 6 km above the crater rim and drifted SW and W. According to a news article ash fell in residential areas and at the Ibu observation post (9 km W). Incandescent material was ejected as far as 1 km from the vent onto the NW, W, SW, and S flanks. The Alert Level remained at 4 (the highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 7 km away from the N crater wall opening.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

22 May-28 May 2024 Cite this Report

PVMBG reported that the eruption at Ibu continued during 22-28 May. White steam-and-gas plumes rose 200-600 m above the crater rim and drifted in multiple directions during 22-25 and 28 May. White-and-gray ash plumes rose 200-500 m and drifted SW, W, and N on 26 May. At 0303 on 27 May an eruptive event produced a white, gray, and black ash plume that rose 6 km above the crater rim and drifted SW and W. According to a news article ash fell in residential areas and at the Ibu observation post (9 km W). Incandescent material was ejected as far as 1 km from the vent onto the NW, W, SW, and S flanks. The Alert Level remained at 4 (the highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 7 km away from the N crater wall opening.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Antara News

15 May-21 May 2024 Cite this Report

PVMBG reported that the eruption at Ibu continued to intensify during 11-21 May, with ash plumes rising higher and having denser ash content. Seismicity was also high and increasing. Beginning on 11 May the ash plumes began rising 4-5 km above the summit; the plumes were dense and gray and drifted N and NW, and incandescent ejecta was visible. Eruptive events were recorded on 12 and 14 May, though weather conditions prevented visual observations. During 13-16 May gray-to-black ash plumes rose as high as 5 km and drifted multiple directions. Roaring and banging noises were heard in areas as far away as the Ibu observation post (9 km W). At 1500 on 16 May the Alert Level was raised to 4 (the highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 7 km away from the N crater wall opening. BNPB reported that 263 residents evacuated from three villages, Gam Ici, Goin, and Sangaji Nyeku.

White-and-gray ash plumes with variable densities rose 4-5 km above the summit and drifted multiple directions during 17-18 and 20-21 May. Photos from just after 2000 on 18 May showed lightning in the dense ash plumes. Only white steam-and-gas plumes were visible on 19 May, rising 200-300 m above the summit and drifting N, NE, and E. According to a news report the total number of evacuees rose to more than 400 by 19 May; the residents were from seven villages in the West Halmahera District.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Badan Nacional Penanggulangan Bencana (BNPB); Antara News

8 May-14 May 2024 Cite this Report

PVMBG reported that the eruption at Ibu was intensifying. At 0158 on 8 May a dense gray ash plume rose 2 km above the summit, produced lightning in the plume, and drifted E and SE. Incandescence from the crater was visible and roaring could be heard in areas as far away as the Ibu observation post (9 km W). Seismicity was at high levels. The Alert Level was raised to 3 (the second highest level on a four-level scale) and the public was advised to stay 3 km away from the active crater and 5 km away from the N crater wall opening. Additional ash plumes that same day were gray-to-white or gray-to-black, rose 1.5-2 km, and drifted NE, E, and SE. Dense gray ash plumes rose 1.2-1.5 km and drifted E on 9 May. At 0024 on 11 May a dense gray ash plume rose 4 km and drifted N and NW and at 0912 a dense gray-to-black ash plume rose 5 km and drifted W.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

1 May-7 May 2024 Cite this Report

PVMBG reported that Ibu continued to erupt. A few notable eruptive events occurred during 24-29 April. On 24 April ash plumes rose 800-1,500 m above the summit and roaring was heard at the Ibu observation post (9 km W). On 26 April an eruptive event produced a dense gray ash plume that rose 2 km and drifted SW and W, incandescence that emanated about 700 m from the summit, a boom followed by a roaring noise, and ashfall in residential areas downwind. At 0037 on 28 April an ash plume rose 3.5 km and produced lightning in the plume. Booming and roaring was heard at the observation post and ash fell in residential areas to the W. At 2137 on 29 April a dense gray ash plume rose around 1 km and drifted W and NW; incandescent material was ejected 500 m NW, W, and SW. Booming and rumbling was heard at the observation post. During 1-2 and 5 May dense gray or gray-and-white ash plumes rose as high as 2 km and drifted in multiple directions. White steam-and-gas plumes rose as high as 300 m and drifted E, SE, and S on 4 May. An eruptive event was recorded by the seismic network on 6 May but was not visually confirmed. The Alert Level remained at 2 (the second highest level on a four-level scale) and the public was advised to stay 3.5 km away from the active crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

24 April-30 April 2024 Cite this Report

PVMBG reported that Ibu continued to erupt during 24-30 April. Daily white-and-gray ash plumes generally rose as high as 2 km above the summit and drifted in multiple directions. According to a social media post a loud boom followed by a roar accompanied the eruptive event on 26 April. Ash plumes rose as high as 2 km and incandescence emanated in the plume up to 700 m. At 0037 on 28 April a dense gray-to-black plume rose as high as 3.5 km and drifted W. Incandescence emanated from the summit was visible in a webcam image from 29 April. The Alert Level remained at 2 (the second highest level on a four-level scale), with the public advised to stay outside of the 2 km hazard zone and 3.5 km away from the N area of the active crater.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); FPMKI

17 April-23 April 2024 Cite this Report

PVMBG reported that Ibu continued to erupt during 17-23 April. White-and-gray ash plumes rose 200-2,500 m above the summit and drifted in multiple directions on 17 and 21 April. White steam-and-gas plumes rose 200-600 m above the summit and drifted in multiple directions on the other days. The Alert Level remained at 2 (the second highest level on a four-level scale), with the public advised to stay outside of the 2 km hazard zone and 3.5 km away from the N area of the active crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

10 April-16 April 2024 Cite this Report

PVMBG reported that Ibu continued to erupt during 10-16 April. White-and-gray ash plumes rose 200-2,000 m above the summit and drifted in multiple directions almost daily; white plumes rose 200-500 m above the summit and drifted SE, W, and NW on 15 April. The Alert Level remained at 2 (the second highest level on a four-level scale), with the public advised to stay outside of the 2 km hazard zone and 3.5 km away from the N area of the active crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

27 March-2 April 2024 Cite this Report

PVMBG reported that Ibu continued to erupt during 26 March-2 April. White-and-gray ash plumes rose 200-2,800 m above the summit and drifted NE, NW, W, and SW on most days. There was no observatory report issued for 28 March, though the Darwin VAAC reported that an ash plume identified in satellite images rose to 3.7 km (12,000 ft) a.s.l., or 2.3 km above the summit, and drifted W. The Alert Level remained at 2 (the second highest level on a four-level scale), with the public advised to stay outside of the 2 km hazard zone and 3.5 km away from the N area of the active crater.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Darwin Volcanic Ash Advisory Centre (VAAC)

28 February-5 March 2024 Cite this Report

PVMBG reported that Ibu continued to erupt during 28 February-5 March. White-and-gray ash plumes rose 200-1,500 m above the summit and drifted NW, W, and SW. Ashfall was reported in residential areas to the W on 2 March. The Alert Level remained at 2 (the second highest level on a four-level scale), with the public advised to stay outside of the 2 km hazard zone and 3.5 km away from the N area of the active crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

7 February-13 February 2024 Cite this Report

PVMBG reported that Ibu continued to erupt during 7-13 February. White and gray emissions rose 200-1500 m above the summit daily. Eruptive events were detected by a seismograph on 8 and 10 February. Dense, gray ash emissions rose as high as 1.5 km above the summit and drifted E, SW, and W. Eruption column heights were not observed during 12 February. The Alert Level remained at 2 (the second highest level on a four-level scale), with the public advised to stay outside of the 2 km radius hazard zone and 3.5 km away from the N area of the active crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

31 January-6 February 2024 Cite this Report

PVMBG reported that Ibu continued to erupt during 17-23 January. White-and-gray ash emissions rose 200-1,500 m above the summit and drifted in multiple directions. An eruptive event at 2200 on 2 February produced a white, gray, and black ash plume that rose as high as 2 km above the summit and drifted mainly SW. Booming noises were heard at the observation post. According to a news article, incandescent material was ejected 600 m above the summit and as far as 1 km to the N, NW, W, and S. The Alert Level remained at 2 (the second highest level on a four-level scale), with the public advised to stay outside of the 2 km hazard zone and 3.5 km away from the N area of the active crater.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Antara News

17 January-23 January 2024 Cite this Report

PVMBG reported that Ibu continued to erupt during 17-23 January. Daily white-and-gray or gray-to-brown ash emissions rose 200-1,300 m above the summit and drifted S, SW, and W. On 17 January banging and rumbling sounds were heard at the observation post and glass in the building shook. Minor amounts of ash fell in local areas to the NW, W, and SW of the volcano during 17-19 January. The Alert Level remained at a 2 (the second highest level on a four-level scale), with the public advised to stay outside of the 2 km hazard zone and 3.5 km away from the N area of the active crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

27 December-2 January 2024 Cite this Report

PVMBG reported that Ibu continued to erupt during 27-31 December. Daily white-and-gray ash emissions that were sometimes dense rose 200-800 m above the summit and drifted SE and S. The Alert Level remained at a 2 (the second highest level on a four-level scale), with the public advised to stay outside of the 2 km hazard zone and 3.5 km away from the N area of the active crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

13 December-19 December 2023 Cite this Report

PVMBG reported that Ibu continued to erupt during 13-19 December. Daily white-and-gray ash emissions that were sometimes dense rose 200-1,300 m above the summit and drifted in multiple directions during 13-16 December. The Alert Level remained at a 2 (the second highest level on a four-level scale), with the public advised to stay outside of the 2 km hazard zone and 3.5 km away from the N area of the active crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

15 November-21 November 2023 Cite this Report

PVMBG reported that Ibu continued to erupt during 15-21 November. White-and-gray ash emissions that were sometimes dense rose 200-1,000 m above the summit and drifted E, SE, and S during 15-17 and 21 November. The Alert Level remained at a 2 (the second highest level on a four-level scale), with the public advised to stay outside of the 2 km hazard zone and 3.5 km away from the N area of the active crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

25 October-31 October 2023 Cite this Report

PVMBG reported that Ibu continued to erupt during 25-31 October. Daily white-and-gray ash emissions rose 200-1,000 m above the summit and drifted NW, NE, E, and SE. The Alert Level remained at a 2 (the second highest level on a four-level scale), with the public advised to stay outside of the 2 km hazard zone and 3.5 km away from the N area of the active crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

4 October-10 October 2023 Cite this Report

PVMBG reported that Ibu continued to erupt during 4-10 October. White-and-gray ash emissions rose as high as 1.1 km above the summit during 4-6 October and drifted in multiple directions. The Alert Level remained at a 2 (the second highest level on a four-level scale), with the public advised to stay outside of the 2 km hazard zone and 3.5 km away from the N area of the active crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

20 September-26 September 2023 Cite this Report

PVMBG reported that Ibu continued to erupt during 20-26 September. Daily white-and-gray ash emissions of variable densities generally rose as high as 800 m above the summit and drifted NE, N, and W. At 0712 on 25 September a dense gray ash plume rose 1.5 km and drifted NE. The Alert Level remained at a 2 (the second highest level on a four-level scale), with the public advised to stay outside of the 2 km hazard zone and 3.5 km away from the N area of the active crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

30 August-5 September 2023 Cite this Report

PVMBG reported that Ibu continued to erupt during 30 August-4 September. Daily white-and-gray ash emissions generally rose as high as 800 m above the summit and drifted E, NE, N, and SW. Gray ash plumes rose as high as 1.5 km on 31 August that drifted N and NE, and as high as 1 km on 5 September and drifted W and NW. The Alert Level remained at a 2 (the second highest level on a four-level scale), and the public was advised to stay outside of the 2 km hazard zone, and to stay 3.5 km away from the N area of the active crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

9 August-15 August 2023 Cite this Report

PVMBG reported that Ibu continued to erupt during 9-15 August. Daily white-and-gray ash emissions generally rose as high as 600 m above the summit and drifted N and NE. Gray ash plumes rose to 1 km on 9 August and as high as 1.5 km on 11 August that drifted N and NE. The Alert Level remained at a 2 (the second highest level on a four-level scale), and the public was advised to stay outside of the 2 km hazard zone, and to stay 3.5 km away from the N area of the active crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

26 July-1 August 2023 Cite this Report

PVMBG reported that Ibu continued to erupt during 26 July through 1 August. Near daily white-and-gray ash emissions rose 200-800 m above the summit and drifted in various directions. A gray ash plume rose 500 m above the summit and drifted N at 0913 on 27 July, according to ground observations. The Alert Level remained at a 2 (the second highest level on a four-level scale), and the public was advised to stay outside of the 2 km hazard zone, and to stay 3.5 km away from the N area of the active crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

12 July-18 July 2023 Cite this Report

PVMBG reported that Ibu continued to erupt during 12-18 July. White-and-gray ash plumes of variable densities rose as high as 800 m above the summit and drifted N and E. The Alert Level remained at a 2 (the second highest level on a four-level scale), and the public was advised to stay outside of the 2 km hazard zone, and to stay 3.5 km away from the N area of the active crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

31 May-6 June 2023 Cite this Report

PVMBG reported that Ibu continued to erupt during 31 May-6 June. White-and-gray ash plumes of variable densities rose as high as 1 km above the summit and drifted in multiple directions during 31 May-1 June [correction: 31 May-6 June]. According to the Darwin VAAC ash plume rose 2.1-2.4 km (7,000-8,000 ft) a.s.l. and drifted SE, E, and NE on 2 and 5 June. The Alert Level remained at a 2 (the second highest level on a four-level scale), and the public was advised to stay outside of the 2 km hazard radius, and to stay 3.5 km away from the N area of the active crater.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Darwin Volcanic Ash Advisory Centre (VAAC)

17 May-23 May 2023 Cite this Report

PVMBG reported that Ibu continued to erupt during 18-23 May. An average of approximately 80 eruption-related earthquakes were recorded by the seismic network during 18-22 May. White-and-gray emissions of variable densities rose as high as 1 km above the summit and drifted N, E, SE, and W. At 2021 and 2140 on 21 May dense gray ash plumes rose 600 m and 1 km above the summit, respectively, and drifted W. The Alert Level remained at a 2 (the second highest level on a four-level scale), and the public was advised to stay outside of the 2 km hazard radius, and to stay 3.5 km away from the N area of the active crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

3 May-9 May 2023 Cite this Report

PVMBG reported that the eruption at Ibu continued during 3-9 May. White-and-gray plumes of variable densities rose as high as 800 m above the summit and drifted in several directions. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

12 April-18 April 2023 Cite this Report

PVMBG reported that the eruption at Ibu continued during 12-18 April. White-and-gray plumes of variable densities rose as high as 800 m above the summit and drifted NE, S, SW, and NW. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

15 March-21 March 2023 Cite this Report

PVMBG reported that the eruption at Ibu continued during 15-18 March. White-and-gray plumes of variable densities rose as high as 800 m above the summit and drifted N, SE, SW, and W. The Darwin VAAC reported that on 20 March ash plumes rose to 2.1 km (7,000 ft) a.s.l., or about 800 m above the summit, and drifted SW based on satellite images. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Darwin Volcanic Ash Advisory Centre (VAAC)

8 February-14 February 2023 Cite this Report

PVMBG reported that the eruption at Ibu continued during 7-14 February. White-and-gray plumes of variable densities rose as high as 800 m above the summit and drifted NE and NW during 6-7 February. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

18 January-24 January 2023 Cite this Report

PVMBG reported that the eruption at Ibu continued during 17-24 January. Daily white-and-gray plumes of variable densities rose 200-1,000 m above the summit and drifted in multiple directions. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

28 December-3 January 2023 Cite this Report

PVMBG reported that the eruption at Ibu continued during 28 December 2022-2 January 2023. Daily white-and-gray emissions of variable densities rose 200-800 m above the summit and drifted in multiple directions. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

9 November-15 November 2022 Cite this Report

PVMBG reported that the eruption at Ibu continued during 9-15 November. Daily white and gray gas-and-steam emissions rose 200-1,000 m above the summit and drifted S, SW, and NW. On 11 November similar emissions rose as high as 1.5 km above the summit and drifted SW and NW. The Darwin VAAC reported that discrete ash emissions rose to 2.1 km altitude and drifted W on 13 November. A possible weak thermal anomaly was observed in satellite imagery. On 15 November a hotspot was visible, accompanied by multiple ash emissions that rose to 2.7 km altitude and drifted NE. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Darwin Volcanic Ash Advisory Centre (VAAC)

5 October-11 October 2022 Cite this Report

PVMBG reported that the eruption at Ibu continued during 4-11 October. Daily gray-and-white ash plumes of variable densities rose as high as 1 km above the summit and drifted in multiple directions. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

14 September-20 September 2022 Cite this Report

PVMBG reported that the eruption at Ibu continued during 14-20 September. Gray-and-white ash plumes of variable densities rose as high as 800 m above the summit and drifted in multiple directions. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

10 August-16 August 2022 Cite this Report

PVMBG reported that the eruption at Ibu continued during 9-16 August. Gray-and-white ash plumes of variable densities generally rose as high as 1.5 km above the summit and drifted in multiple directions. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

20 July-26 July 2022 Cite this Report

PVMBG reported that the eruption at Ibu continued during 21-25 July. Gray-and-white ash plumes of variable densities generally rose as high as 2 km above the summit and drifted in multiple directions. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

1 June-7 June 2022 Cite this Report

PVMBG reported that the eruption at Ibu continued during 31 May-7 June. Daily gray-and-white ash plumes of variable densities generally rose 200-800 m above the summit and drifted in multiple directions. An eruptive event at 1116 on 6 June produced a dense gray ash plume that rose 4 km above the summit and drifted W. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

18 May-24 May 2022 Cite this Report

PVMBG reported that the eruption at Ibu continued during 17-24 May. Daily gray-and-white ash plumes of variable densities generally rose 200-1,500 m above the summit and drifted in multiple directions. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

11 May-17 May 2022 Cite this Report

PVMBG reported that the eruption at Ibu continued during 11-17 May. Daily gray-and-white ash plumes of variable densities generally rose 200-800 m above the summit and drifted mainly W and N. Eruptive events at 0903 and 1807 on 14 May and at 1759 on 15 May produced ash plumes that rose 0.8-1 km above the summit and drifted W and SW. At 1646 on 16 May dense gray ash plumes rose around 2.5 km and drifted W. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

20 April-26 April 2022 Cite this Report

PVMBG reported that the eruption at Ibu continued during 22-26 April. Daily dense gray ash plumes generally rose 400-1,500 m above the summit and drifted W and NE, though at 0948 on 25 April ash plumes rose up to 3 km above the summit and drifted W. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

30 March-5 April 2022 Cite this Report

PVMBG reported that the eruption at Ibu continued during 25-31 March. On 30 March at 1048 an ash plume rose 1 km above the summit that drifted S. Roughly 58 avalanches traveled 100-400 m N and NW. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

9 March-15 March 2022 Cite this Report

PVMBG reported that the eruption at Ibu continued during 9-15 March. Gray-and-white ash plumes rose 200-1,000 m above the summit and drifted N and NE. Avalanches traveled 100-400 m N and NW during 14-15 March. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

9 February-15 February 2022 Cite this Report

PVMBG reported that the eruption at Ibu continued during 9-15 January. Gray-and-white ash plumes rose 200-1,000 m above the summit and drifted W and E. Strong rumbling sounds were heard during 8-9 January and minor ashfall was reported in a populated area just W of the volcano. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

29 December-4 January 2022 Cite this Report

PVMBG reported that during 31 December 2021 to 4 January 2022 gray-and-white ash plumes from Ibu rose 200-1,000 m above the summit. Avalanches were detected daily, though not visually observed. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

10 November-16 November 2021 Cite this Report

PVMBG reported that during 10-11 and 14-16 November gray-and-white ash plumes from Ibu rose 200-800 m above the summit. During 10-11 November the ash plumes drifted S and W, causing minor ashfall in villages to the W. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

27 October-2 November 2021 Cite this Report

PVMBG reported that during 26 October-2 November gray-and-white ash plumes from Ibu rose 200-800 m above the summit and drifted N, W, and S. There were at least 151 eruptive events observed during 28-30 October. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

8 September-14 September 2021 Cite this Report

PVMBG reported that during 7-12 September gray-and-white ash plumes from Ibu rose 200-800 m above the summit and drifted N and W. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

18 August-24 August 2021 Cite this Report

PVMBG reported that during 18-24 August gray-and-white ash plumes from Ibu rose 200-800 m above the summit and drifted N, W, and NW. On 18 August at 0810 an ash plume rose 800 m above the summit and drifted W. A thermal anomaly was visible in satellite images during 22-23 August, according to the Darwin VAAC. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

16 June-22 June 2021 Cite this Report

PVMBG reported that during 15-21 June gray-and-white ash plumes from Ibu rose 200-800 m above the summit and drifted N, E, and S. As many as 63 eruptive events per day were recorded during 18-20 June. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

9 June-15 June 2021 Cite this Report

PVMBG reported that during 9-15 June gray-and-white ash plumes from Ibu rose 200-800 m above the summit and drifted mainly N and E. Rock avalanches were recorded during 11-13 June, though they were not visually confirmed. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

12 May-18 May 2021 Cite this Report

PVMBG reported that during 11-12 and 15-17 gray-and-white ash plumes from Ibu rose 200-800 m above the summit and drifted mainly N, W, and S. Inclement weather sometimes prevented visual observations, especially during 13-14 May. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

7 April-13 April 2021 Cite this Report

PVMBG reported that during 6-13 April gray-and-white ash plumes from Ibu rose 200-1,000 m above the summit and drifted mainly N, E, and S. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

24 March-30 March 2021 Cite this Report

PVMBG reported that on 25 March at 1814 a gray ash plume from Ibu rose to 2.3 km (7,500 ft) a.s.l. and drifted W. White-and-gray emissions rose 200-1,000 m above the crater drifting N, S, E, and W during 25-26, 28, and 30 March. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

24 February-2 March 2021 Cite this Report

PVMBG reported that during 24 February-2 March gray-and-white ash plumes from Ibu rose 200-800 m above the summit and drifted in multiple directions. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

17 February-23 February 2021 Cite this Report

PVMBG reported that on most days during 17-23 February gray-and-white ash plume from Ibu were seen rising 200-800 m above the summit and drifting in multiple directions. Weather conditions sometimes hindered observations. The report stated that during 16-17 February there were a total of 88 eruptive events. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

3 February-9 February 2021 Cite this Report

PVMBG reported that during 3-9 February gray-and-white ash plume from Ibu rose 200-800 m above the summit and drifted in multiple directions. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

20 January-26 January 2021 Cite this Report

PVMBG reported that during 20-26 January gray-and-white ash plume from Ibu rose 200-800 m above the summit and drifted N, W, and S. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

6 January-12 January 2021 Cite this Report

PVMBG reported that at 1058 on 7 January an ash plume from Ibu rose 500 m above the summit and drifted N. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

16 December-22 December 2020 Cite this Report

PVMBG reported that at 1826 on 19 December an ash plume from Ibu rose 400 m above the summit and drifted N. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

2 December-8 December 2020 Cite this Report

PVMBG reported that during 2-8 December gray-and-white ash plume from Ibu rose 200-800 m above the summit and drifted N and E. There were 70-81 eruptive events per day recorded during 2-4 and 6-8 December. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Darwin Volcanic Ash Advisory Centre (VAAC)

25 November-1 December 2020 Cite this Report

PVMBG reported that at 1818 on 27 November a gray ash plume from Ibu rose 800 m and drifted W. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Darwin Volcanic Ash Advisory Centre (VAAC)

18 November-24 November 2020 Cite this Report

PVMBG and the Darwin VAAC reported that on 19 and 22 November ash plumes from Ibu were identified in satellite images rising to 2.1 km (7,000 ft) a.s.l. and drifting SW and W. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Darwin Volcanic Ash Advisory Centre (VAAC)

11 November-17 November 2020 Cite this Report

PVMBG reported that on most days during 10-16 November ash plumes were visible rising 200-800 m above Ibu’s summit and drifting in multiple directions. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Darwin Volcanic Ash Advisory Centre (VAAC)

4 November-10 November 2020 Cite this Report

The Darwin VAAC reported that during 4-5 November intermittent, discrete ash plumes from Ibu rose to 1.8 km (6,000 ft) a.s.l. and drifted S and SSW. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC); Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

21 October-27 October 2020 Cite this Report

PVMBG reported that during 21-26 October ash plumes rose 200-800 m above Ibu’s summit and drifted N, NE, and E. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Darwin Volcanic Ash Advisory Centre (VAAC)

7 October-13 October 2020 Cite this Report

PVMBG reported that during 7-13 October white-to-gray ash plume rose 200-800 m above Ibu’s summit and drifted N and E. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

23 September-29 September 2020 Cite this Report

PVMBG reported that at 0554 on 26 September a white-to-gray ash plume from Ibu rose 600 m and drifted S. At 0641 on 27 September and at 0554 on 28 September ash plumes rose 500 m and drifted N. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

16 September-22 September 2020 Cite this Report

PVMBG reported that during 15-22 September white-and-gray ash plumes rose 200-800 m above Ibu’s summit and drifted in multiple directions. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

26 August-1 September 2020 Cite this Report

PVMBG reported that during 18-29 August white and gray ash plumes rose 200-800 m above Ibu’s summit and drifted in multiple directions; weather conditions prevented observations on 27 August. The Darwin VAAC noted a thermal anomaly over the volcano on 23 August. Emissions were brown and white on 30 August. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Darwin Volcanic Ash Advisory Centre (VAAC)

12 August-18 August 2020 Cite this Report

PVMBG reported that during 12-14 and 16-17 August ash plumes rose 200-800 m above Ibu’s summit and drifted N, W, and S. Weather conditions sometimes prevented visual observations of the summit. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Darwin Volcanic Ash Advisory Centre (VAAC)

5 August-11 August 2020 Cite this Report

PVMBG reported that on 5 August an ash plume rose 500 m above Ibu’s summit and drifted N. A few hours later the Darwin VAAC reported that an ash plume rose to 4.3 km (14,000 ft) a.s.l., or 2.9 km above the summit. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Darwin Volcanic Ash Advisory Centre (VAAC)

29 July-4 August 2020 Cite this Report

PVMBG reported that during 29-30 July white-to-gray plumes rose 200-800 m above Ibu’s summit and drifted NW; weather conditions prevented visual observations during 31 July-1 August. The Darwin VAAC reported a thermal anomaly in satellite images on 31 July. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Darwin Volcanic Ash Advisory Centre (VAAC)

15 July-21 July 2020 Cite this Report

PVMBG reported that during 15-20 July white and gray plumes with variable densities rose 200-800 m above Ibu’s summit and drifted in multiple directions; weather conditions prevented visual observations on 17 July. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Darwin Volcanic Ash Advisory Centre (VAAC)

17 June-23 June 2020 Cite this Report

The Darwin VAAC reported that during 20-21 June ash plumes from Ibu rose to 1.8 km (6,000 ft) a.s.l. and drifted NW and W based on satellite images and weather models. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC); Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

10 June-16 June 2020 Cite this Report

The Darwin VAAC reported that on 15 June ash plumes from Ibu rose to 1.8 km (6,000 ft) a.s.l. and drifted NW and W based on satellite images and weather models. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC); Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

20 May-26 May 2020 Cite this Report

The Darwin VAAC reported that on 20 May an ash plume from Ibu rose to 1.8 km (6,000 ft) a.s.l., or 500 m above the crater rim, based on information from PVMBG. Weather clouds prevented satellite views of the event. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC); Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

13 May-19 May 2020 Cite this Report

The Darwin VAAC reported that on 16 May an ash plume from Ibu rose to 1.8 km (6,000 ft) a.s.l. and drifted NW based on satellite images and weather models. Later that day an ash plume rose to 13.7 km (45,000 ft) a.s.l., detached from the volcano and drifted S, and quickly dissipated. Ash plumes rose to 4.3 (14,000 ft) a.s.l. and drifted W during 17-18 May. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC); Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

6 May-12 May 2020 Cite this Report

The Darwin VAAC reported that on 9 May an ash plume from Ibu rose to 2.1 km (7,000 ft) a.s.l. and drifted SE based on satellite images and weather models. On 12 May an ash plume rose to 2.1 km a.s.l. and drifted N. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC); Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

29 April-5 May 2020 Cite this Report

PVMBG reported that at 1853 on 2 May and 1022 on 4 May ash plumes rose 800 m above Ibu’s summit and drifted N. During 4-5 May the Darwin VAAC noted intermittent ash plumes rising to around 800 m and drifting E. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Darwin Volcanic Ash Advisory Centre (VAAC)

8 April-14 April 2020 Cite this Report

The Darwin VAAC reported that during 8-10 and 13 April ash plumes from Ibu rose 1.8-2.1 km (6,000-7,000 ft) a.s.l. and drifted N, SE, and S based on satellite images and weather models. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC); Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

1 April-7 April 2020 Cite this Report

The Darwin VAAC reported that on 2 April an ash plume from Ibu rose to 2.1 km (7,000 ft) a.s.l. and drifted SW based on satellite images and weather models. On 7 April an ash plume rose to 1.8 km (6,000 ft) a.s.l. and drifted S. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC); Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

25 March-31 March 2020 Cite this Report

PVMBG reported that at 1730 on 26 March, at 0642 on 28 March, and at 0855 on 29 March gray ash plumes rose 600 m above Ibu’s summit and drifted W and N. The Darwin VAAC stated that on 30 March an ash plume rose to 2.1 km (7,000 ft) a.s.l. and drifted NE based on satellite images and weather models. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Darwin Volcanic Ash Advisory Centre (VAAC)

18 March-24 March 2020 Cite this Report

The Darwin VAAC reported that during 18-19 March ash plumes from Ibu rose to 2.1 km (7,000 ft) a.s.l. and drifted W based on satellite images and weather models. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC); Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

11 March-17 March 2020 Cite this Report

The Darwin VAAC reported that on 17 March multiple discrete ash plumes from Ibu rose to 2.1 km (7,000 ft) a.s.l. and drifted SW based on satellite images and weather models. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC); Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

4 March-10 March 2020 Cite this Report

The Darwin VAAC reported that on 10 March multiple discrete ash plumes from Ibu rose to 2.1 km (7,000 ft) a.s.l. and drifted SE based on satellite images, weather models, and information from PVMBG. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC); Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

26 February-3 March 2020 Cite this Report

The Darwin VAAC reported that on 27 February an ash plume from Ibu rose to 2.1 km (7,000 ft) a.s.l. and drifted SW based on satellite images and weather models. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

19 February-25 February 2020 Cite this Report

The Darwin VAAC reported that on 18, 20, and 22 February ash plumes from Ibu rose to 1.8-2.1 km (6,000-7,000 ft) a.s.l. and drifted SE, S, and SW. PVMBG stated that at 1113 on 20 February a white-to-gray ash plume rose at least 400 m above the summit (6,800 ft a.s.l.) and drifted SE. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

12 February-18 February 2020 Cite this Report

PVMBG reported that on 16 February an ash plume from Ibu rose at least 800 m above the summit (6,800 ft a.s.l.) and drifted W. The Darwin VAAC stated that on 17 February an ash plume rose to 2.1 km (7,000 ft) a.s.l. and drifted SE. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

5 February-11 February 2020 Cite this Report

The Darwin VAAC reported that during 5-6 February multiple discrete ash plumes from Ibu, identified in satellite images, rose to 1.8-2.1 km (6,000-7,000 ft) a.s.l. and drifted SE and E. An ongoing thermal anomaly was also visible. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Darwin Volcanic Ash Advisory Centre (VAAC)

29 January-4 February 2020 Cite this Report

PVMBG reported that during 29 January-2 February white-to-gray plumes rose 200-800 m above Ibu’s summit; plumes drifted S on 2 February. Weather clouds prevented visual observations during 3-4 February. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Darwin Volcanic Ash Advisory Centre (VAAC)

25 December-31 December 2019 Cite this Report

The Darwin VAAC reported that on 26 December discrete ash puffs from Ibu were identified in satellite images rising to 2.1 km (7,000 ft) a.s.l. and drifting S. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

27 November-3 December 2019 Cite this Report

Based on PVMBG observations and satellite images, the Darwin VAAC reported that on 3 December an ash plume from Ibu rose to 2.1 km (7,000 ft) a.s.l. and drifted NE. A thermal anomaly was visible in satellite images.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

20 November-26 November 2019 Cite this Report

Based on PVMBG observations, satellite images, and wind data, the Darwin VAAC reported that during 20-21 and 23-25 November ash plumes from Ibu rose 1.8-2.1 km (6,000-7,000 ft) a.s.l. and drifted in multiple directions. A thermal anomaly was visible in satellite images on 21 November.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

30 October-5 November 2019 Cite this Report

PVMBG reported that during 1-5 November white-and-gray plumes from Ibu rose 200-800 m above the summit and drifted E and N. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

16 October-22 October 2019 Cite this Report

PVMBG reported that at 0829 on 20 October an ash plume from Ibu rose at least 400 m above the summit and drifted W. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

9 October-15 October 2019 Cite this Report

PVMBG reported that at 0707 on 15 October an ash plume from Ibu rose at least 400 m above the summit and drifted S. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

2 October-8 October 2019 Cite this Report

The Darwin VAAC reported that during 6-7 October ash plumes from Ibu rose to altitudes of 2.1-2.7 km (7,000-9,000 ft) a.s.l. and drifted S and N based on satellite images and weather models. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC); Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

25 September-1 October 2019 Cite this Report

The Darwin VAAC reported that on 28 September ash plumes from Ibu rose to altitudes of 1.8-2.1 km (6,00-7,000 ft) a.s.l. and drifted WNW based on satellite images and weather models. PVMBG reported that at 1806 on 30 September an ash plume rose about 800 m above the crater rim and drifted N. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

4 September-10 September 2019 Cite this Report

PVMBG reported that at 0936 on 4 September a gray ash plume from Ibu rose at least 300 m above the summit and drifted S. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

28 August-3 September 2019 Cite this Report

PVMBG reported that at 1847 on 31 August an ash plume from Ibu rose at least 800 m above the summit and drifted N. Seismicity was characterized by an explosion signal and earthquakes indicating rock avalanches. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

21 August-27 August 2019 Cite this Report

PVMBG reported that at 0704 on 22 August an ash plume from Ibu rose at least 800 m above the summit and drifted W. Seismicity was characterized by an explosion signal and earthquakes indicating rock avalanches. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

14 August-20 August 2019 Cite this Report

PVMBG reported that at 1107 on 14 August an ash plume from Ibu rose at least 800 m above the summit and drifted N. Seismicity was characterized by an explosion signal and earthquakes indicating rock avalanches. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

7 August-13 August 2019 Cite this Report

PVMBG reported that during 7-12 August white-to-gray plumes rose 200-800 m above Ibu’s crater rim. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

10 July-16 July 2019 Cite this Report

The Darwin VAAC reported that on 15 July an ash plume from Ibu rose to 2.1 km (7,000 ft) a.s.l. and drifted NE based on satellite images and weather models. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

3 July-9 July 2019 Cite this Report

The Darwin VAAC reported that on 6 July an ash plume from Ibu rose to 2.1 km (7,000 ft) a.s.l. and drifted N, based on satellite images and weather models. An intermittent thermal anomaly was also visible. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

19 June-25 June 2019 Cite this Report

The Darwin VAAC reported that on 21 June ash plumes from Ibu rose to 1.8 km (6,000 ft) a.s.l. and drifted N and NE based on satellite images and weather models. During 24-25 June ash plumes rose to 1.5-2.4 km (5,000-8,000 ft) a.s.l. and drifted SE and ESE. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

29 May-4 June 2019 Cite this Report

The Darwin VAAC reported that on 31 May multiple ash plumes from Ibu rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted W based on satellite data. On 2 June ash plumes rose to an altitude of 3 (10,000 ft) a.s.l. and drifted W. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC); Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

22 May-28 May 2019 Cite this Report

The Darwin VAAC reported that during 23-24 May ash plumes from Ibu rose to altitudes of 2.4-2.7 km (8,000-9,000 ft) a.s.l. and drifted SE based on satellite data. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC); Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

15 May-21 May 2019 Cite this Report

The Darwin VAAC reported that during 14-16 and 18-19 May ash plumes from Ibu rose to 2.1-3 km (7,000-10,000 ft) a.s.l. and drifted NW, N, ENE, and SE based on satellite data. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC); Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

8 May-14 May 2019 Cite this Report

The Darwin VAAC reported that on 8 May an ash plume from Ibu rose to 2.4 km (8,000 ft) a.s.l. and drifted ESE based on satellite data. PVMBG noted that at 1821 on 9 May an ash plume rose 600 m above the crater rim and drifted S. Seismic activity was characterized by explosions, tremor, and signals indicating rock avalanches. According to the VAAC an ash plume drifted ESE at an altitude of 1.8 (6,000 ft) a.s.l. on 10 May. A 14 May VONA stated that at 1846 an ash plume rose 800 m and drifted N. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC); Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

1 May-7 May 2019 Cite this Report

The Darwin VAAC reported that on 7 May an ash plume from Ibu was visible in satellite data rising to an altitude of 2.4 km (8,000 ft) a.s.l. and drifting ESE. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

17 April-23 April 2019 Cite this Report

The Darwin VAAC reported that on 18 April an ash plume from Ibu was identified in satellite images drifting E at an altitude of 2.1 km (7,000 ft) a.s.l. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM); Darwin Volcanic Ash Advisory Centre (VAAC)

10 April-16 April 2019 Cite this Report

The Darwin VAAC reported that on 10 April ash plumes from Ibu were identified in satellite images drifting N at an altitude of 2.1 km (7,000 ft) a.s.l. During 15-16 April ash plumes drifted N and NE at an altitude of 2.4 km (8,000 ft) a.s.l. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

3 April-9 April 2019 Cite this Report

The Darwin VAAC reported that on 28 March multiple ash plumes from Ibu were identified in satellite images drifting SE at an altitude of 2.1 km (7,000 ft) a.s.l. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC); Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

27 March-2 April 2019 Cite this Report

The Darwin VAAC reported that on 28 March multiple ash plumes from Ibu were identified in satellite images drifting SE at an altitude of 2.1 km (7,000 ft) a.s.l. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

20 March-26 March 2019 Cite this Report

The Darwin VAAC reported that a minor ash plume from Ibu rose to an altitude of 2.4 km (8,000 ft) a.s.l., drifted about 17 km NE, and dissipated. An ash plume rose to an altitude of 2.1 km (7,000 ft) a.s.l. later that day, and to 2.4 km on 23 March; both plumes drifted E. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC); Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

27 February-5 March 2019 Cite this Report

The Darwin VAAC reported that on 28 February an ash plume from Ibu was identified in satellite images drifting N at an altitude of 2.1 km (7,000 ft) a.s.l. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

20 February-26 February 2019 Cite this Report

Based on satellite and wind model data, the Darwin VAAC reported that during 25-26 February ash plumes from Ibu rose to altitudes of 2.4-3 km (8,000-10,000 ft) a.s.l. and drifted NE and ENE. A thermal anomaly was also visible. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC); Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

6 February-12 February 2019 Cite this Report

PVMBG reported that during 5-12 February dense white-to-gray plumes from Ibu rose 200-800 m above the summit and drifted E, S, and W. Foggy conditions occasionally prevented visual observations. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

5 December-11 December 2018 Cite this Report

PVMBG reported that on 11 December an ash plume from Ibu rose to 1.8 km (6,000 ft) a.s.l., according to the Darwin VAAC. Weather clouds prevented views of the plume in satellite data. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC); Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

21 November-27 November 2018 Cite this Report

The Darwin VAAC reported that on 26 November an ash plume from Ibu was identified in satellite images rising to 1.8 km (6,000 ft) a.s.l. and drifting SE. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC); Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

17 October-23 October 2018 Cite this Report

PVMBG reported that at 1223 on 19 October an event at Ibu generated an ash plume that rose 400 m above the crater rim and drifted E. Another event at 1809 on 22 October generated an ash plume that rose 400 m above the crater rim and drifted N. On both days seismic signals indicated explosions and rock avalanches. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

3 October-9 October 2018 Cite this Report

Based on satellite images and model data, the Darwin VAAC reported that on 6 October an ash plume from Ibu rose to 1.8 km (6,000 ft) a.s.l. and drifted WSW.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

26 September-2 October 2018 Cite this Report

Based on satellite images and wind model data, the Darwin VAAC reported that on 28 and 30 September ash plumes from Ibu rose to 1.8 km (6,000 ft) a.s.l. and drifted NE and N.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

22 August-28 August 2018 Cite this Report

PVMBG reported that at 0838 on 24 August an event at Ibu generated an ash plume that rose 800 m above the crater rim and drifted S. Seismicity was characterized by explosions and rock avalanches. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

15 August-21 August 2018 Cite this Report

PVMBG reported that at 1742 on 20 August an event at Ibu generated an ash plume that rose 1.2 km above the crater rim. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

8 August-14 August 2018 Cite this Report

PVMBG reported that at 0259 on 13 August an event at Ibu generated an ash plume that rose 600 m above the crater rim. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

25 July-31 July 2018 Cite this Report

PVMBG reported that at 1852 on 28 July an event at Ibu generated an ash plume that rose 5.5 km above the crater rim and drifted SE. An event at 1612 on 29 July produced an ash plume that rose 4.8 km and drifted N. Ash plumes later drifted SE. Seismic signals for both events were characterized by explosions and avalanches. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

11 July-17 July 2018 Cite this Report

PVMBG reported that during 10-15 July white-to-gray plumes rose 200-800 m above Ibu’s crater rim. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

4 July-10 July 2018 Cite this Report

Based on satellite images and PVMBG (a ground observer) notices, the Darwin VAAC reported that on 6 July an ash plume from Ibu rose to 2.1 km (7,000 ft) a.s.l. and drifted N. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC); Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

27 June-3 July 2018 Cite this Report

Based on satellite images and model data, the Darwin VAAC reported that on 27 June an ash plume from Ibu rose to 1.8 km (6,000 ft) a.s.l. and drifted W. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

20 June-26 June 2018 Cite this Report

PVMBG reported that at 0857 on 21 June an event at Ibu generated an ash plume that rose at least 600 m above the crater rim and drifted N. Signals indicating an explosion and rock avalanches were detected in seismic data. During 22-26 June ash plumes rose as high as 850 m and drifted WNW and W. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

13 June-19 June 2018 Cite this Report

PVMBG reported that during 14-19 June white-to-gray plumes rose 200-600 m above Ibu’s crater rim. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

6 June-12 June 2018 Cite this Report

PVMBG reported that at 1206 on 6 June an eruption at Ibu generated an ash plume that rose at least 500 m above the crater rim and drifted N. An event at 1750 on 12 June produced an ash plume that rose 600 m and drifted N. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

2 May-8 May 2018 Cite this Report

At 0622 on 5 May an eruption at Ibu generated an ash plume that rose at least 600 m above the crater rim and drifted N and NE, based on information from the Darwin VAAC and PVMBG. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

25 April-1 May 2018 Cite this Report

PVMBG reported that at 1822 on 30 April an eruption at Ibu generated a dark gray ash plume that rose at least 500 m above the crater rim and drifted E. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

18 April-24 April 2018 Cite this Report

PVMBG reported that at 0637 on 20 April an eruption at Ibu generated a gray-white ash plume that rose at least 600 m above the crater rim and drifted S. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

7 March-13 March 2018 Cite this Report

PVMBG reported that although foggy conditions often prevailed at Ibu ash plumes were observed rising 300-600 m above the carter rim and drifting W and S. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

23 August-29 August 2017 Cite this Report

Based on satellite images and model data, the Darwin VAAC reported that on 24 and 28 August ash plumes from Ibu rose 1.5-1.8 km (5,000-6,000 ft) a.s.l. and drifted W.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

9 August-15 August 2017 Cite this Report

Based on PVMBG observations, the Darwin VAAC reported that on 15 August an ash plume from Ibu rose to an altitude of 1.8 km (6,000 ft) a.s.l. and drifted N.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

14 June-20 June 2017 Cite this Report

Based on PVMBG observations, satellite images, and wind data, the Darwin VAAC reported that during 14 and 17-19 June ash plumes from Ibu rose 1.5-1.8 km (5,000-6,000 ft) a.s.l. and drifted S, SW, W, and N.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

7 June-13 June 2017 Cite this Report

Based on PVMBG observations, webcam and satellite images, and wind data, the Darwin VAAC reported that during 9-12 and 14 June ash plumes from Ibu rose 1.5-1.8 km (4,800-6,000 ft) a.s.l. and drifted N, W, and SSW.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

31 May-6 June 2017 Cite this Report

PVMBG reported that eruptions at Ibu on 1 and 5 June generated ash plumes that rose 150-250 m above the crater and drifted N and SE, respectively.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

17 May-23 May 2017 Cite this Report

Based on analyses of satellite imagery and information from PVMBG, the Darwin VAAC reported that during 19-20 and 23 May ash plumes from Ibu rose 1.5-1.8 km (5,000-6,000 ft) a.s.l. and drifted NE, E, and S.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

10 May-16 May 2017 Cite this Report

Based on analyses of satellite imagery and information from PVMBG, the Darwin VAAC reported that during 10-11 May ash plumes from Ibu rose to an altitude of 1.8 km (6,000 ft) a.s.l. and drifted E and SW. An ash plume on 16 May rose to 1.5 km (5,000 ft) a.s.l.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

26 April-2 May 2017 Cite this Report

Based on PVMBG observations and satellite images the Darwin VAAC reported that during 26-27 and 29-30 April ash plumes from Ibu rose 1.5-1.8 km (5,000-6,000 ft) a.s.l. and drifted E, NE, and N.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

19 April-25 April 2017 Cite this Report

Based on PVMBG observations the Darwin VAAC reported that during 19-21 April ash plumes from Ibu rose 1.5-1.8 km (5,000-6,000 ft) a.s.l. and drifted E and N.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

12 April-18 April 2017 Cite this Report

Based on ground and satellite observations, PVMBG and the Darwin VAAC reported that during 12-13 and 17 April ash plumes from Ibu rose 1.5-1.8 km (4,900-5,900 ft) a.s.l. and drifted S and SW.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

5 April-11 April 2017 Cite this Report

Based on ground observations, PVMBG reported that during 7-8 April ash plumes from Ibu rose to an altitude of 1.7 km (5,500 ft) a.s.l. and drifted N. During 10-11 April ash plumes rose to altitudes of 1.5-1.6 km (4,900-5,200 ft) a.s.l. and drifted S.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

29 March-4 April 2017 Cite this Report

PVMBG reported that an eruption at Ibu at 0058 on 29 March generated an ash plume that rose to an altitude of 1.8 km (5,800 ft) a.s.l. and drifted N. Another event at 0757 on 3 April produced an ash plume that rose to an altitude of 1.7 km (5,500 ft) a.s.l. and drifted S. Seismicity on both days was characterized by events indicating explosions and avalanches.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

11 January-17 January 2017 Cite this Report

Based on analyses of satellite imagery, the Darwin VAAC reported that on 15 January a minor ash plume from Ibu rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted almost 30 km E. On 17 January PVMBG noted that an ash plume rose to an altitude of 1.5 km (5,000 ft) a.s.l., or 200 m above the summit, and drifted E.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

24 August-30 August 2016 Cite this Report

PVMBG reported that during 1 June-22 August white-to-medium-gray plumes rose as high as 800 m above Ibu’s summit crater and drifted E, although inclement weather often prevented visual observations. Seismicity was dominated by signals indicating surface or near-surface activity, and the continued growth of the lava dome in the N part of the crater. The Alert Level remained at 2 (on a scale of 1-4). The public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

23 March-29 March 2016 Cite this Report

PVMBG reported that during 7-22 March gray-to-gray-black plumes rose as high as 700 m above Ibu’s summit crater, although inclement weather often prevented visual observations. Seismicity was dominated by signals indicating surface or near-surface activity, and the continued growth of the lava dome in the N part of the crater. The Alert Level remained at 2 (on a scale of 1-4). The public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

2 March-8 March 2016 Cite this Report

PVMBG reported that during 1 January-7 March white-to-gray plumes rose as high as 500 m above Ibu’s summit crater, although inclement weather often prevented visual observations. Seismicity was dominated by signals indicating surface or near-surface activity, and the continued growth of the lava dome in the N part of the crater. The Alert Level remained at 2 (on a scale of 1-4). The public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

18 November-24 November 2015 Cite this Report

PVMBG reported that during 1-17 November white-to-gray plumes rose as high as 450 m above Ibu’s summit crater. Seismicity was dominated by signals indicating surface or near-surface activity, and the continued growth of the lava dome. The Alert Level remained at 2 (on a scale of 1-4). The public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

4 November-10 November 2015 Cite this Report

PVMBG reported that during 1 August-3 November white-to-gray plumes rose as high as 500 m above Ibu’s craters. Seismicity was dominated by signals indicating surface or near-surface activity, and the continued growth of the lava dome. The Alert Level remained at 2 (on a scale of 1-4). The public was warned to stay at least 2 km away from the active crater, and 3.5 km away from the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

4 December-10 December 2013 Cite this Report

PVMBG reported that during 7 June-9 December white-to-gray plumes rose from Ibu’s craters. Observers in Goin (7 km NNW) noted that the lava dome, which had grown taller than the N crater rim in June, continued to grow; incandescent material from the dome filled the river valley in the direction of the Duono Village, about 5 km NW. Seismicity remained relatively stable. On 10 December the Alert Level was lowered to 2 (on a scale of 1-4). The public was warned to stay at least 2 km away from the active crater, and 3.5 km away from the N part.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

5 June-11 June 2013 Cite this Report

CVGHM reported that during May through 6 June white-to-gray plumes rose 200-450 m above Ibu's crater rim. Seismicity increased and volcanic tremor was detected. The lava dome contained to grow, especially the N part, and in early June had grown taller than the N crater rim. Based on visual and instrumental observations, as well as the hazard potential, CVGHM increased the Alert Level to 3 (on a scale of 1-4) on 7 June. The public was warned to stay at least 3 km away from the active crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

7 September-13 September 2011 Cite this Report

CVGHM reported mostly clear conditions at Ibu during January-8 September and that white-to-gray plumes were observed rising 200-400 m above the craters. On 20 August observers from the nearby villages of Goin and Duono noted multiple eruptions from the S, E, and N craters. Eruption "smoke" rose 50-250 m above the craters and an avalanche traveled 300 m. Seismicity indicating avalanches occurred on average 45 times per day during January-8 September. Other types of seismic signals fluctuated during the time period but stabilized or decreased towards September. Based on visual observations and seismicity, CVGHM lowered the Alert Level to 2 (on a scale of 1-4) on 8 September.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

5 August-11 August 2009 Cite this Report

CVGHM reported that white and gray plumes from Ibu rose 300-400 m above the crater rim during 15 July-4 August, and that earthquakes became more frequent during 27 July-4 August. Lava flows were seen on 2 August. Later that day, a thunderous sound was followed by incandescence at the summit. On 3 August, incandescent material was ejected as high as 20 m above the crater. On 5 August, the Alert Level was increased to 3 (on a scale of 1-4). The growing lava dome had reached a height so that it was visible from Duono Village, about 5 km NW. Residents and tourists were not permitted within 2 km of the crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

15 July-21 July 2009 Cite this Report

CVGHM reported that white and gray plumes from Ibu rose 600 m above the crater rim prior to 11 July and 400 m above the crater afterwards. Ashfall was reported in nearby areas, within a 3-km-radius of Ibu. Based on information from the Gamsungi observation post and seismic data, CVGHM lowered the Alert Level on 16 July from 3 to 2 (on a scale of 1-4). Residents and tourists were not permitted within 2 km of the crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

16 April-22 April 2008 Cite this Report

CVGHM reported that seismicity from Ibu increased during 6-14 April and remained elevated during 15-20 April. Plumes described as "eruption smoke" rose to altitude of 1.8-2.1 km (5,900-6,900 ft) a.s.l. during 12-21 April and were gray during 18-21 April. The Alert Level was increased to 3 (on a scale of 1-4) on 21 April. Residents and tourists were not permitted within 2 km of the crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

9 April-15 April 2008 Cite this Report

CVGHM reported that white plumes from Ibu rose to an altitude of 1.5 km (5,000 ft) a.s.l. during 17-31 March and were spotted "often." The plume altitudes increased to 1.6 km (5,200 ft) a.s.l. on 31 March. During 4-5 April, seismicity increased in amplitude and plume altitude increased to 1.8-2.0 km (5,900-6,600 ft) a.s.l. On 5 April, the eruption plume was gray and material fell onto the crater. The Alert Level remained at 2 (on a scale of 1-4). The community was not permitted to climb or approach the crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

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Basic Data Volcano Number Last Known Eruption Elevation Latitude Longitude 268030 2025 CE 1,325 m / 4,347 ft 1.488°N 127.63°E Morphology Volcano Landform Composite Volcano Types Stratovolcano Pyroclastic cone(s) Maar(s) Rock Types Major Andesite / Basaltic Andesite Basalt / Picro-Basalt Tectonic Setting Subduction zone Oceanic crust (< 15 km) Population Within 5 km Within 10 km Within 30 km Within 100 km 1,560 14,549 64,581 637,988

Geological Summary The truncated summit of Gunung Ibu stratovolcano along the NW coast of Halmahera Island has large nested summit craters. The inner crater, 1 km wide and 400 m deep, has contained several small crater lakes. The 1.2-km-wide outer crater is breached on the N, creating a steep-walled valley. A large cone grew ENE of the summit, and a smaller one to the WSW has fed a lava flow down the W flank. A group of maars is located below the N and W flanks. The first observed and recorded eruption was a small explosion from the summit crater in 1911. Eruptive activity began again in December 1998, producing a lava dome that eventually covered much of the floor of the inner summit crater along with ongoing explosive ash emissions. References The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. Jezek P, 1979. Volcano resume--Ibu. Volcano News, 1: 7. Morris J D, Jezek P A, Hart S R, Gill J B, 1983. The Halmahera Island arc, Molucca Sea collision zone, Indonesia: a geochemical survey. In: Hayes D E (ed) The Tectonic and Geologic Evolution of Southeast Asia Seas and Islands, part 2, Amer Geophys Union, Geophys Monogr, 27: 373-387. Neumann van Padang M, 1951. Indonesia. Catalog of Active Volcanoes of the World and Solfatara Fields, Rome: IAVCEI, 1: 1-271. Saing U B, Bani P, Kristianto, 2014. Ibu volcano, a center of spectacular dacite dome growth and long-term continuous eruptive discharges. Journal of Volcanology and Geothermal Research, 282:36-42. . Verstappen H Th, 1964. Some volcanoes of Halmahera (Moluccas) and their geomorphological setting. Royal Dutch Geographical Society (Koninklijk Nederlands Aardrijkskundig Genootschap), 81: 297-316.

Eruptive History

There is data available for 5 confirmed Holocene eruptive periods.

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.

Synonyms
Iboe | Tobaru | Tubaru | Toebaroe
Craters
Feature Name	Feature Type	Elevation	Latitude	Longitude
Bitjara, Lake	Maar
Gam Itji, Lake	Maar
Mati, Lake	Maar
Moro	Crater
Todoke, Lake	Maar
Toduoko, Lake	Maar

Photo Gallery

This view from the summit of Ternate Island shows the Halmahera Island volcanoes of Jailolo in the foreground, Gamkonora on the left, and flat-topped Ibu volcano on the right. Jailolo volcano has no known historical eruptions, but youthful lava flows are located on the eastern flank. Gamkonora is one of Halmahera's most active volcanoes, while Ibu, with its nested summit craters, one of which has a crater lake, has erupted only once in historical time, in 1911.

Copyrighted photo by Katia and Maurice Krafft, 1976. Three Halmahera Island volcanoes are visible in this view from the SW at the summit of Gamalama volcano on Ternate Island. The twin caldera complex of Todoku-Ranu is on the left, the historically active volcano of Gamkonora is on the skyline at the right center, and Jailolo volcano rises above the clouds at the lower right. These volcanoes are part of a N-S chain extending along the western coast of northern Halmahera Island.

Copyrighted photo by Katia and Maurice Krafft, 1976. The truncated summit of Gunung Ibu stratovolcano along the NW coast of Halmahera is seen here from the SW at the summit of Gamalama volcano. The broad summit of Gunung Ibu has nested summit craters. The inner crater, 1 km wide and 400 m deep, contains several small crater lakes. Only two eruptions are known from Ibu in historical time, a small explosive eruption from the summit crater in 1911, and another beginning in December 1998.

Copyrighted photo by Katia and Maurice Krafft, 1976. Gunung Ibu volcano on the NW coast of Halmahera Island rises beyond a small village on its WNW flank. The summit of the stratovolcano is truncated by nested craters; the inner crater, 1 km wide and 400 m deep, contains several small crater lakes. The outer crater is breached on the north side, forming the deep valley seen here on the left side of the summit ridge. Few eruptions are known in historical time from Ibu, although it was erupting at the time of this February 1999 photo.

Photo by Agus Karim, 1999 (Volcanological Survey of Indonesia).

Smithsonian Sample Collections Database

There are no samples for Ibu in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

External Sites

Copernicus Browser	The Copernicus Browser replaced the Sentinel Hub Playground browser in 2023, to provide access to Earth observation archives from the Copernicus Data Space Ecosystem, the main distribution platform for data from the EU Copernicus missions.
MIROVA	Middle InfraRed Observation of Volcanic Activity (MIROVA) is a near real time volcanic hot-spot detection system based on the analysis of MODIS (Moderate Resolution Imaging Spectroradiometer) data. In particular, MIROVA uses the Middle InfraRed Radiation (MIR), measured over target volcanoes, in order to detect, locate and measure the heat radiation sourced from volcanic activity.
MODVOLC Thermal Alerts	Using infrared satellite Moderate Resolution Imaging Spectroradiometer (MODIS) data, scientists at the Hawai'i Institute of Geophysics and Planetology, University of Hawai'i, developed an automated system called MODVOLC to map thermal hot-spots in near real time. For each MODIS image, the algorithm automatically scans each 1 km pixel within it to check for high-temperature hot-spots. When one is found the date, time, location, and intensity are recorded. MODIS looks at every square km of the Earth every 48 hours, once during the day and once during the night, and the presence of two MODIS sensors in space allows at least four hot-spot observations every two days. Each day updated global maps are compiled to display the locations of all hot spots detected in the previous 24 hours. There is a drop-down list with volcano names which allow users to 'zoom-in' and examine the distribution of hot-spots at a variety of spatial scales.
WOVOdat    Single Volcano View    Temporal Evolution of Unrest    Side by Side Volcanoes	WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore. GVMID Data on Volcano Monitoring Infrastructure The Global Volcano Monitoring Infrastructure Database GVMID, is aimed at documenting and improving capabilities of volcano monitoring from the ground and space. GVMID should provide a snapshot and baseline view of the techniques and instrumentation that are in place at various volcanoes, which can be use by volcano observatories as reference to setup new monitoring system or improving networks at a specific volcano. These data will allow identification of what monitoring gaps exist, which can be then targeted by remote sensing infrastructure and future instrument deployments.
Volcanic Hazard Maps	The IAVCEI Commission on Volcanic Hazards and Risk has a Volcanic Hazard Maps database designed to serve as a resource for hazard mappers (or other interested parties) to explore how common issues in hazard map development have been addressed at different volcanoes, in different countries, for different hazards, and for different intended audiences. In addition to the comprehensive, searchable Volcanic Hazard Maps Database, this website contains information about diversity of volcanic hazard maps, illustrated using examples from the database. This site is for educational purposes related to volcanic hazard maps. Hazard maps found on this website should not be used for emergency purposes. For the most recent, official hazard map for a particular volcano, please seek out the proper institutional authorities on the matter.
IRIS seismic stations/networks	Incorporated Research Institutions for Seismology (IRIS) Data Services map showing the location of seismic stations from all available networks (permanent or temporary) within a radius of 0.18° (about 20 km at mid-latitudes) from the given location of Ibu. Users can customize a variety of filters and options in the left panel. Note that if there are no stations are known the map will default to show the entire world with a "No data matched request" error notice.
UNAVCO GPS/GNSS stations	Geodetic Data Services map from UNAVCO showing the location of GPS/GNSS stations from all available networks (permanent or temporary) within a radius of 20 km from the given location of Ibu. Users can customize the data search based on station or network names, location, and time window. Requires Adobe Flash Player.
DECADE Data	The DECADE portal, still in the developmental stage, serves as an example of the proposed interoperability between The Smithsonian Institution's Global Volcanism Program, the Mapping Gas Emissions (MaGa) Database, and the EarthChem Geochemical Portal. The Deep Earth Carbon Degassing (DECADE) initiative seeks to use new and established technologies to determine accurate global fluxes of volcanic CO2 to the atmosphere, but installing CO2 monitoring networks on 20 of the world's 150 most actively degassing volcanoes. The group uses related laboratory-based studies (direct gas sampling and analysis, melt inclusions) to provide new data for direct degassing of deep earth carbon to the atmosphere.
Large Eruptions of Ibu	Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
EarthChem	EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).