Report for Stromboli
The Sezione di Catania - Osservatorio Etneo (INGV) reported that eruptive activity continued at Stromboli during 23-29 June. Webcam images showed Strombolian activity at four vents in Area N within the upper part of the Sciara del Fuoco and from at least two vents in Area C-S (South-Central Crater) on the crater terrace. The vents in Area N continued to produce low- to medium-intensity explosions at a rate of 7-11 events per hour, ejecting lapilli and bombs less than 150 m above the vents. Low-intensity explosions at the vents in Area C-S ejected ash above the vent at a rate of 0-1 events per hour. The Alert Level remained at Yellow (the second lowest level on a four-level scale) according to the Dipartimento della Protezione Civile.

Report for Gaua
On 27 June the Vanuatu Meteorology and Geohazards (VMGD) reported that unrest continued at Gaua during the month. Steam and/or gas emissions from the vent were visible in satellite images during 9-10 and 17 June and sulfur dioxide emissions were identified during 10-11 June. The Alert Level remained at 2 (on a scale of 0-5) and the public was warned to stay away from the main cone.

Report for Ambae
On 27 June the Vanuatu Meteorology and Geohazards Department (VMGD) reported ongoing unrest at Ambae during the month. Steam and/or gas emissions from the active vents were visible in webcam images and photos taken during field visits during 10-12 and 19 June. Sulfur dioxide emissions were ongoing and detected in satellite data during 3-17, 19-21, and 23-26 June. Seismic data also confirmed ongoing unrest. The Alert Level remained at 2 (on a scale of 0-5), and the public was warned to stay outside of the Danger Zone, defined as a 2-km radius around the active vents in Lake Voui, and away from drainages during heavy rains.

Report for Ambrym
On 27 June the Vanuatu Meteorology and Geohazards Department (VMGD) reported ongoing unrest at Ambrym during the month. Webcam images recorded steam emissions rising from both Benbow and Marum craters during 7, 10-11, and 24 June, and a weak thermal anomaly on 17 June. Seismic data confirmed ongoing unrest. The Alert Level remained at 2 (on a scale of 0-5). VMGD warned the public to stay outside of Permanent Danger Zone A, defined as a 1-km radius around Benbow Crater and a 2-km radius around Marum Crater, and to stay 500 m away from the ground cracks created by the December 2018 eruption.

Report for Lopevi
On 27 June the Vanuatu Meteorology and Geohazards Department (VMGD) reported that seismic data confirmed continuing unrest at Lopevi throughout June. Small fumarolic steam plumes were continuously emitted from the summit crater during 6 and 10-11 June based on a webcam images. Low-level thermal anomalies were identified in satellite images on 2 June, indicative of increased surface temperatures, and sulfur dioxide emissions were detected on 10 June. The Alert Level remained at 2 (on a scale of 0-4).

Report for Yasur
On 27 June the Vanuatu Meteorology and Geohazards Department (VMGD) reported that activity at Yasur had continued during the month at a level of “major unrest,” as defined by the Alert Level 2 status (on a scale of 0-5). Field photos and webcam images indicated that explosions continued, producing emissions of gas, steam, and/or ash. Sulfur dioxide gas emissions were identified in satellite images during 4-12, 15-16, 20-22, and 26 June, and low-level thermal anomalies were identified during 5, 19-20, and 24 June. Seismic data confirmed continuing volcanic activity with explosions that were occasionally strong. The report warned that ejected material from explosions could fall in and around the crater. The public was reminded to not enter the restricted area within 600 m around the boundaries of the Permanent Exclusion Zone, defined by Danger Zone A on the hazard map.

Report for Semeru
The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that activity continued at Semeru during 25 June-1 July, often with multiple daily eruptive events recorded by the seismic network. Emissions were not visually observed most of the week. At 0025 and 0030 on 1 July white-and-gray ash plumes rose 500-600 m above the summit and drifted SW. The Alert Level remained at 2 (the second lowest level on a scale of 1-4). The public was warned to stay at least 3 km away from the summit in all directions, 8 km from the summit to the SE, 500 m from the banks of the Kobokan drainage as far as 13 km from the summit, and to avoid other drainages including the Bang, Kembar, and Sat, due to lahar, avalanche, and pyroclastic flow hazards.

Report for Raung
The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that eruptive activity at Raung continued during 25 June-1 July. No emissions were visible during 25-28 June, likely due to weather conditions. Daily ash plumes during 29 June-1 July rose as high has as 600 m above the crater rim and drifted NW and W. Incandescence at the summit was sometimes visible in webcam images. The Alert Level remained at 2 (on a scale of 1-4) and the public was warned to stay 3 km away from the summit crater.

Report for Lewotobi
The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that unrest continued at Lewotobi Laki-laki during 25 June-1 July. Daily white plumes rose as high as 500 m above the summit and drifted in multiple directions. The Alert Level remained at 4 (on a scale of 1-4) and on 25 June the exclusion zone was reduced to 6 km from the center of Laki-laki and 7 km in a semicircle clockwise from the SW to the NE.

Report for Lewotolok
The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that an eruption at Lewotolok was ongoing during 25 June-1 July. Daily gray, white-to-gray, or gray-to-black ash plumes rose 400-1,200 m above the summit of the cone and drifted in multiple directions. Clear nighttime webcam images showed incandescent material both at the summit cone and being ejected above the cone. Lava flows on the flanks of the main volcano edifice were also incandescent. The Alert Level remained at 2 (on a scale of 1-4) and the public was warned to stay 2 km away from the vent and 2.5 km away on the S, SE, and W flanks.

Report for Dukono
The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that eruptive activity at Dukono continued during 25 June-1 July. Daily white-and-gray or white, gray, and black gas-and-ash plumes rose 400-1,200 m above the summit and drifted NE and E. Booming, rumbling, and/or banging was heard by residents and at the observation post, 10-11 km N, during 25 and 28-30 June and on 1 July. The Alert Level remained at Level 2 (on a scale of 1-4) and the public was warned to stay 4 km away from the Malupang Warirang Crater.

Report for Ibu
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.

Report for Suwanosejima
The Japan Meteorological Agency (JMA) reported that eruptive activity at Suwanosejima's Ontake Crater continued during 23-30 June. Incandescence was observed nightly in webcam images. Explosions at 1041 on 23 June, at 1939 on 27 June, and at 0806 on 30 June produced ash plumes that rose 2.3, 0.6, and 1.7 km above the crater rim and drifted NE, E, and straight up, respectively. Eruptive events during 27 and 29-30 June produced ash plumes that rose as high as 2.1 km above the crater rim and mainly rose straight up or drifted W. The Alert Level remained at 2 (the second level on a five-level scale) and the public was warned to be cautious within 1.5 km of the crater.

Report for Kirishimayama
The Japan Meteorological Agency (JMA) reported that eruptive activity continued at Shinmoedake (Shinmoe peak, a stratovolcano of the Kirishimayama volcano group) at least through 30 June. After the eruption on 22 June no further eruptive events were detected in monitoring data during 23-24 June, and weather clouds often obscured views. On 24 June white plumes rose more than 400 m above the crater rim and at most 100 m above a fissure on the W flank based on webcam images. Tilt data from a station 3 km SE indicated inflation on the NW flank during 23-25 June, though minor inflation had been detected since March. The number of volcanic earthquakes with epicenters directly beneath Shinmoedake had been fluctuating since late October 2024, though the rates were very high with more than 600 events recorded during 23-24 June, more than 400 events during 24-25 June, and more than 300 events during 25-26 June. Volcanic tremor was also periodically detected. On 25 June sulfur dioxide emissions were high, averaging 2,100 tons per day.

Weather clouds obscured views during the morning of 26 June, though at around 0758 a small amount of ashfall was reported at Takaharu Town (12 km E) in Miyazaki Prefecture. At 1250 white plumes were visible rising 1 km above the crater rim and drifting E, and by 1507 they were drifting SE. Grayish white plumes continuously rose as high as 1.6 km above the crater rim, drifting S and SE, from 1025 on 27 June until at least 1500 on 1 July. Minor ashfall was reported at the Miyazaki Local Meteorological Observatory (Miyazaki City, 50 km E) during 26-27 June, and a relatively large amount of ash fell in both Kobayashi City (13 km NE) and Kirishima City (21 km SW) during 0900-2300 on 28 June. During a 28 June field survey, observers noted that the plumes were rising from a row of N-S-trending craters located on the NE part of the crater floor. Ash deposits were visible on the N flank and the temperature of those deposits was higher than surrounding areas. A geothermal area near a fissure on the W flank was enlarged compared to 7 May observations. The Alert Level remained at 3 (on a 5-level scale) and the public was warned to exercise caution within 3 km from Shinmoedake Crater.

Report for Sheveluch
The Far Eastern Branch of the Russian Academy of Sciences (FEB RAS) reported that eruptive activity at Sheveluch continued during 20-26 June. Weather clouds mostly obscured views through the week, though a few ash plumes were visible in webcam or satellite views on 23 and 25 June rising as high as 4.5 km a.s.l. and drifting E and SE.

Report for Great Sitkin
The Alaska Volcano Observatory (AVO) reported that slow lava effusion continued to feed a thick flow in Great Sitkin’s summit crater during 25 June-1 July. Small daily earthquakes were detected by the seismic network, including signals probably caused by small rockfalls from the steep S and SE flanks. Slightly elevated surface temperatures consistent with lava effusion were occasionally observed in clear satellite views. Observers on a nearby ship saw a diffuse steam plume rising above the dome during 27-38 June. The Volcano Alert Level remained at Watch (the third level on a four-level scale) and the Aviation Color Code remained at Orange (the third color on a four-color scale).

Report for Iliamna
The Alaska Volcano Observatory (AVO) reported that repairs to Iliamna’s seismic network were completed during the previous week, allowing for sufficient data to be available to monitor activity. At 1141 on 1 July the Aviation Color Code was changed from Unassigned to Green (the lowest level on a four-color scale) and the Volcano Alert Level was changed from Unassigned to Normal (the lowest level on a four-level scale).

Report for Kilauea
The Hawaiian Volcano Observatory (HVO) reported that the eruption within Kilauea’s Kaluapele summit caldera, characterized by episodic fountaining and intermittent spatter at two vents along the SW margin of Halema’uma’u Crater, continued at variable levels during 25 June-1 July. Nighttime incandescence at both the N and S vents was visible overnight during 24-28 June and intermittent lava spattering at the N vent was visible during 26-29 June. Small, sporadic dome fountains and intermittent lava overflows at the N vent began at 0727 on 29 June. Small, sustained lava fountaining began at 0803 and the fountains slowly grew over the next hour; at 0905 the height and vigor of the fountains increased notably. The fountains were as high as 150 m by 0931 and multiple lava flows were advancing on the crater floor. An eruption plume rose at least 6 km (20,000 ft) above the ground; variable winds blew gas and tephra plumes in different directions. The fountains rose higher, reaching 340 m for several hours. The activity started to wane and ceased at 1954, after 11 hours of continuous fountaining. Flames were visible at the S vent for a few minutes afterwards. The N vent produced an estimated 6.2 million cubic meters of lava covering about 80 percent of the crater floor. The Volcano Alert Level remained at Watch (the third level on a four-level scale) and the Aviation Color Code remained at Orange (the third color on a four-color scale).

Report for Santa Maria
The Instituto Nacional de Sismología, Vulcanología, Meteorología e Hidrología (INSIVUMEH) reported high levels of ongoing eruptive activity at Santa Maria’s Santiaguito dome complex during 24 June-1 July with continuing lava extrusion at Caliente dome. Daily explosions, 1-2 per hour when reported, generated gas-and-ash plumes that rose as high as 1.2 km above the dome and drifted as far as 30 km N, NW, W, and SW. Effusion of blocky lava and collapses of material produced block avalanches that descended multiple flanks; the collapsed material sometimes produced short pyroclastic flows that reached the base of Caliente cone. Incandescence was visible at Caliente dome and upper part of the W flank lava flow. Minor ashfall was reported in communities surrounding the volcano during 25-26 June and in San Marcos (10 km SW), Loma Linda (7 km W), Palajunoj (17 km SSW), and other areas downwind during 29-30 June.

Report for Fuego
The Instituto Nacional de Sismología, Vulcanologia, Meteorologia e Hidrología (INSIVUMEH) reported that explosions were last detected at Fuego on 22 June. Incandescence at the summit was observed in webcam images during 24 June-1 July. Fumarolic plumes occasionally rose from the summit.

Report for Rincon de la Vieja
The Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA) reported that at 1720 on 26 June a small phreatic eruption at Rincón de la Vieja produced a gas plume that rose 100 m above the crater rim and drifted NW.

Report for Poas
The Observatorio Vulcanológico y Sismológico de Costa Rica-Universidad Nacional (OVSICORI-UNA) reported continuing gas-and-steam emissions with occasional minor amounts of ash at Poás during 24 June-1 July. Uplift ceased to be detected in the past few weeks and no significant deformation was detected during the current week. Incandescence was periodically visible and detected in infrared webcam views at Boca A vent. The hyperacid lake over Boca C continued to rise, notably during periods of heavy rain. Dense gas-and-steam emissions continued to be emitted from Boca A; gas component ratios were at normal levels. The emissions contained minor ash content at around 1530 on 25 June and rose 500 m above the crater rim. The Alert Level remained at 2 (the second lowest level on a four-level scale) and the Aviation Color Code remained at Yellow (the second lowest color on a four-color scale).