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Inielika

Photo of this volcano
  • Country
  • Volcanic Region
  • Landform | Volc Type
  • Last Known Eruption
  • 8.73°S
  • 120.98°E

  • 1,559 m
    5,115 ft

  • 264090
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

Most Recent Weekly Report: 13 March-19 March 2024 Citation IconCite this Report

PVMBG lowered the Alert Level for Inielika to 1 (on a scale of 1-4) at 1100 on 16 March, noting that unrest had decreased based on visual observations, seismicity, and geochemistry data. The public was warned to stay at least 500 m away from the summit crater and to avoid solfatara zones and hot springs.

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


Most Recent Bulletin Report: September 2001 (BGVN 26:09) Citation IconCite this Report

Small February-March 2001 ash plumes and generally low seismicity

Since the decline in eruptive activity that occurred during 23 January-5 February 2001 (BGVN 26:01), variable seismicity has prevailed. Ash plumes were observed in February and March reaching 10-500 m above the volcano. The Volcanological Survey of Indonesia (VSI) reported varying amounts of seismicity (table 1). VSI has not reported new eruptive activity at Inielika since May 2001.

Table 1. Seismic activity detected at Inielika during February through May 2001. Courtesy of VSI.

Date Deep volcanic (A-type) Shallow volcanic (B-type) Tectonic
06 Feb-11 Feb 2001 23 7 10
20 Feb-26 Feb 2001 34 15 32
27 Feb-05 Mar 2001 57 19 51
06 Mar-12 Mar 2001 30 6 18
12 Mar-18 Mar 2001 4 1 13
19 Mar-23 Mar 2001 3 -- 9
27 Mar-01 Apr 2001 6 -- --
02 Apr-08 Apr 2001 4 -- 11
09 Apr-15 Apr 2001 7 4 6
16 Apr-23 Apr 2001 5 10 11
25 Apr-01 May 2001 5 10 11

Information Contacts: Dali Ahmad, Volcanological Survey of Indonesia (VSI), Jalan Diponegoro No. 57, Bandung 40122, Indonesia (URL: http://www.vsi.esdm.go.id/).

Weekly Reports - Index


2024: March
2023: October
2001: January | February | April


13 March-19 March 2024 Citation IconCite this Report

PVMBG lowered the Alert Level for Inielika to 1 (on a scale of 1-4) at 1100 on 16 March, noting that unrest had decreased based on visual observations, seismicity, and geochemistry data. The public was warned to stay at least 500 m away from the summit crater and to avoid solfatara zones and hot springs.

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


4 October-10 October 2023 Citation IconCite this Report

PVMBG reported that seismicity at Inielika generally consisted of low levels of low-frequency earthquakes and 0-1 daily deep volcanic earthquakes. Seismicity began to increase on 29 September and remained elevated at least through 4 October. The daily number of deep volcanic earthquakes increased to an average of 9, though notably a total of 17 were recorded on 1 October and 18 were recorded on 3 October. The temperatures and gas concentrations at four hot spring locations had significantly decreased compared to July measurements. The Alert Level was raised to 2 (on a scale of 1-4) at 1000 on 4 October due to increased potential for a phreatic eruption; the public was warned to stay at least 1 km away from the summit crater and to stay away from solfatara zones.

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


25 April-1 May 2001 Citation IconCite this Report

VSI reported that during 16-23 April seismic activity increased at Inielika in comparison to the previous week. Seismographs recorded five deep volcanic, ten shallow volcanic, and eleven tectonic earthquakes. Inielika is at Alert Level 2 (on a scale of 1-4). The previous report of significant volcanic activity occurred on 11 January 2001 when minor explosions began.

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


7 February-13 February 2001 Citation IconCite this Report

During 6-11 February, Inielika volcano remained active and the VSI reported no significant change in volcanic activity. An ash plume was observed rising 25-500 m above the volcano and there was a slight increase in the number of deep volcanic earthquakes in comparison to the previous week. The Alert Level at the volcano was reduced from 3 to 2 (on a scale of 1-4).

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


31 January-6 February 2001 Citation IconCite this Report

The VSI reported that during 23-29 January no explosive activity occurred, but a plume of white ash rose 100-500 m above the crater. The volcano remained at Alert Level 3 (on a scale of 1-4).

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


17 January-23 January 2001 Citation IconCite this Report

The VSI reported that during 16-22 January ongoing explosions sent ash 100-1,000 m above the crater rim. Ash was deposited within a 10-20 m radius around the crater; lapilli with a maximum diameter of 50 cm were deposited out to ~500 m around the crater. Observations on 21 January revealed that two new large craters formed, to the SE and the NW. The SE crater was 50 m in diameter and 10 m deep. The NW crater was 20 m in diameter, open to the NW, and 1.1 m deep. The volcano remained at Alert Level 3 (on a scale of 1-4).

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


10 January-16 January 2001 Citation IconCite this Report

A minor explosion on 11 January 2001 at 1915 produced an ashfall deposit less than 0.5 mm thick in Bajawa (~8 km from the source). On 13 January 2001 at 0700 three explosions occurred, sending a plume ~300-1,000 m above the crater rim; it moved eastward towards Toa village and southward towards Boya village, Bajawa, and Bolodio city. Thundering sounds were heard from the observatory (~7.5 km from the summit). Continuous tremor was recorded with an amplitude of 2 mm and 59 explosion earthquake events had been registered as of 15 January. Inielika is at Alert Level 3 (on a scale of 1-4).

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


Bulletin Reports - Index

Reports are organized chronologically and indexed below by Month/Year (Publication Volume:Number), and include a one-line summary. Click on the index link or scroll down to read the reports.

12/2000 (BGVN 25:12) Explosions eject tephra in first eruption since 1905

01/2001 (BGVN 26:01) Explosive activity declines; new images of the summit area

09/2001 (BGVN 26:09) Small February-March 2001 ash plumes and generally low seismicity




Information is preliminary and subject to change. All times are local (unless otherwise noted)


December 2000 (BGVN 25:12) Citation IconCite this Report

Explosions eject tephra in first eruption since 1905

A minor explosion occurred at 1915 on 11 January 2001. The explosion ejected ash that coated Bajawa (~8 km from the summit) with an ash layer less than 0.5 mm thick. Increased activity after 11 January prompted the VSI to set the volcano's hazard status to 3 (on a scale of 1-4). Three explosions occurred at about 0700 on 13 January, sending ash 300-1,000 m above the crater rim. Workers at the volcano's observatory post, located ~7.5 km from the summit, subsequently heard thundering sounds. Ash, which appeared dense and light in color, blew E to Toa and S to Boya, Bolodio, and Bajawa. By 15 January, a seismograph recorded continuous tremor with an amplitude of 2 mm in addition to 59 explosion earthquakes with amplitudes of 2-14 mm.

Ash emission was ongoing as of 16 January, and ranged from 100 to 1,000 m above the summit. VSI workers observed two new large craters trending SE-NW. The top of the SE crater measured 50 m in diameter, narrowed to 25 m at its base, and was 10 m deep. It emitted an audible sound and ejected an ash plume from its N wall with variable pressure. Winds tended to blow ash toward the S. The NW crater was 20 m in diameter and 1.1 m deep. The temperature of a fumarole measured 95°C, and nearby ground temperature measured 89°C.

During 16-22 January, explosions produced both ash and lapilli. Light gray ash fell around the main crater within a 10-20 m radius. Lapilli, which had a maximum size of 50 cm, fell up to 500 m from the main crater.

Information Contacts: Dali Ahmad, Volcanological Survey of Indonesia (VSI), Jalan Diponegoro No. 57, Bandung 40122, Indonesia (URL: http://www.vsi.esdm.go.id/).


January 2001 (BGVN 26:01) Citation IconCite this Report

Explosive activity declines; new images of the summit area

The following report covers Inielika's activity during 23 January-5 February 2001. The VSI issued three photographs showing Inielika's summit area (figures 1-3). No explosions occurred during 23-29 January, unlike earlier in the month (BGVN 25:12). Instead, a white gas-and-steam plume rose 100-500 m above the summit. Volcanic earthquakes, tectonic earthquakes, and continuous tremor with amplitudes varying from 0.3 to 1.2 mm occurred.

Figure (see Caption) Figure 1. A gas-and-steam plume exiting from one of Inielika's craters on 11 January 2001. Courtesy of VSI.
Figure (see Caption) Figure 2. View of Inielika's summit crater lakes as seen on 11 January 2001. The lake in the center foreground is green, and the lake behind and to the left of it is a dark color. A light-colored plume issues from a vent on the right side of the image. Which of the volcano's ten craters these represent remains uncertain. Courtesy of VSI.
Figure (see Caption) Figure 3. A recently formed vent (arrow) seen in a crater on Inielika's summit on 11 January 2001. Courtesy of VSI.

Activity remained relatively similar during the following week of 30 January-5 February. A gas-and-steam plume rose 25-500 m above the summit. The number of deep volcanic (A-type) earthquakes increased with respect to the previous week, and tremor was no longer continuous. The VSI maintained Inielika's hazard status at Level 3 (on a scale of 1-4) as of 5 February.

Information Contacts: Dali Ahmad, Volcanological Survey of Indonesia (VSI), Jalan Diponegoro No. 57, Bandung 40122, Indonesia (URL: http://www.vsi.esdm.go.id/).


September 2001 (BGVN 26:09) Citation IconCite this Report

Small February-March 2001 ash plumes and generally low seismicity

Since the decline in eruptive activity that occurred during 23 January-5 February 2001 (BGVN 26:01), variable seismicity has prevailed. Ash plumes were observed in February and March reaching 10-500 m above the volcano. The Volcanological Survey of Indonesia (VSI) reported varying amounts of seismicity (table 1). VSI has not reported new eruptive activity at Inielika since May 2001.

Table 1. Seismic activity detected at Inielika during February through May 2001. Courtesy of VSI.

Date Deep volcanic (A-type) Shallow volcanic (B-type) Tectonic
06 Feb-11 Feb 2001 23 7 10
20 Feb-26 Feb 2001 34 15 32
27 Feb-05 Mar 2001 57 19 51
06 Mar-12 Mar 2001 30 6 18
12 Mar-18 Mar 2001 4 1 13
19 Mar-23 Mar 2001 3 -- 9
27 Mar-01 Apr 2001 6 -- --
02 Apr-08 Apr 2001 4 -- 11
09 Apr-15 Apr 2001 7 4 6
16 Apr-23 Apr 2001 5 10 11
25 Apr-01 May 2001 5 10 11

Information Contacts: Dali Ahmad, Volcanological Survey of Indonesia (VSI), Jalan Diponegoro No. 57, Bandung 40122, Indonesia (URL: http://www.vsi.esdm.go.id/).

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.

Eruptive History

There is data available for 2 confirmed Holocene eruptive periods.

2001 Jan 11 - 2001 Mar 16 (?) ± 15 days Confirmed Eruption VEI: 2

Episode 1 | Eruption Summit crater complex
2001 Jan 11 - 2001 Mar 16 (?) ± 15 days Evidence from Observations: Reported

List of 5 Events for Episode 1 at Summit crater complex

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Seismicity (tremor)
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
   - - - -    - - - - Lapilli
2001 Jan 11    - - - - VEI (Explosivity Index)

1905 Nov - 1905 Nov Confirmed Eruption VEI: 2

Episode 1 | Eruption
1905 Nov - 1905 Nov Evidence from Observations: Reported

List of 4 Events for Episode 1

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
   - - - -    - - - - Property Damage
1905 Nov    - - - - VEI (Explosivity Index)
Deformation History

There is no Deformation History data available for Inielika.

Emission History

There is no Emissions History data available for Inielika.

Photo Gallery

This view from the east shows the N-S-trending crater complex of Inielika volcano. At the far left is Wolo Lega crater, and the 1905 crater is located just right of center. The high point at the center of the photo is Wawolika cone.

Photo published in Kemmerling 1929, "Vulkanen van Flores" (courtesy of Volcanological Survey of Indonesia).
The Inielika chain of cones and craters stretches across the central highlands of Flores Island at right in this view from the NE. The peak at left center is Gunung Inierie volcano, the highest on the island. On the far left horizon is Wolo Bobo, a feature of the Bajawa cinder cone complex. The high irregular peak on the right horizon is part of the Lobobutu caldera wall, with various Inielika craters in the foreground.

Photo published in Kemmerling 1929, "Vulkanen van Flores" (courtesy of Volcanological Survey of Indonesia).
A brief phreatic eruption in November 1905 lasting 5 hours formed this crater at Inielika volcano. The 125-m-wide crater formed on the floor of Wolo Inielika crater, one of many craters along a N-S-trending ridge.

Photo by E. Weissenborn (published in Kemmerling 1929, "Vulkanen van Flores," courtesy of Volcanological Survey of Indonesia).
A N-S-trending chain of cones and craters in the central highlands forms the summit of Inielika volcano, seen here from the east. Ten craters, some of which contain crater lakes, occur across the complex summit region and others occupy the flanks. A phreatic explosion in 1905 formed a new crater.

Photo by Ruska Hadian, 1970 (Volcanological Survey of Indonesia).
Two of the many summit craters of Inielika can be seen in the left foreground. It is a broad, low volcano in central Flores Island that was constructed within the Lobobutu caldera. The complex summit includes ten craters, some of which contain lakes. A phreatic explosion that formed a new crater in 1905 was the volcano's only eruption during the 20th century. Inierie volcano is the prominent peak on the right horizon.

Photo by Volcanological Survey of Indonesia.
GVP Map Holdings

Maps are not currently available due to technical issues.

The maps shown below have been scanned from the GVP map archives and include the volcano on this page. Clicking on the small images will load the full 300 dpi map. Very small-scale maps (such as world maps) are not included.

Smithsonian Sample Collections Database

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

External Sites