mercredi 26 nov. 2025 21:00 | il y a 4 h | Auteur : several contributors
Map of today’s active volcanoes
Krasheninnikov (Kamchatka, Russia): The Kamchatkan Volcanic Eruption Response Team (KVERT) reported that the eruption at Krasheninnikov continued during 15-20 November. A daily large thermal anomaly over the volcano was identified in satellite images. Ash plumes drifted 40 km SW and NE on 13 and 15 November, respectively.
Plumes of resuspended ash drifted 195 km SE on 20 November. Satellite images showed new lava lobes along the margins of the N flow near the distal end of the lava flow during 16-22 November. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).
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Dates and times are provided in Coordinated Universal Time (UTC); specific events are indicated in local time where specified.
Sources: Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Copernicus
Shiveluch (Kamchatka): The Kamchatkan Volcanic Eruption Response Team (KVERT) reported continuing eruptive activity at Sheveluch’s “300 years of RAS” dome on the SW flank of Old Sheveluch and at the Young Sheveluch dome during 14-20 November. Thermal anomalies over the domes were identified in satellite images during 13-17 November; the volcano was obscured by weather clouds on the other days. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).
Dates are based on UTC; specific events are in local time where noted.
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Sources: Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
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Bezymianny (Kamchatka): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Tokyo warned about a volcanic ash plume that rose up to estimated 33000 ft (10100 m) altitude or flight level 330 and is moving at 35 kts in E direction.
The full report is as follows: VA CONTINUOUSLY OBS IN SATELLITE IMAGERY OBS VA DTG:26/1420Z to 33000 ft (10100 m)
…26 Nov:
The Kamchatkan Volcanic Eruption Response Team (KVERT) and Laboratory for Seismic and Volcanic Activity Research (ISVA) reported that eruptive activity increased at Bezymianny on 25 November 2025 (local). Gas and vapor plume(s) were reported. Effusive activity continued. Plume(s) from pyroclastic flow were reported. The alert level remained at “Orange” (level 3 on a 5-level scale). The aviation alert level remained at “Orange” (level 3 on a 4-level scale). Activity also included: plume(s) from pyroclastic flow.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT); Laboratory for Seismic and Volcanic Activity Research (ISVA)
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Current Alerts:
Observatory alert level: “Orange” (level 3 on a 5-level scale)
…26 Nov:
The Kamchatkan Volcanic Eruption Response Team (KVERT) reported that activity at Bezymianny was gradually increasing. A large bright thermal anomaly was identified in satellite images during 16-20 November. The Far Eastern Branch of the Russian Academy of Sciences (FEB RAS) reported that on most days hot avalanches descended the SE flank, crater incandescence was visible, and occasional ash plumes generated at the summit or by avalanches rose as high as 4 km a.s.l.; weather clouds sometimes obscured views.
The Kamchatka Volcanological Station (Volkstat) reported that scientists visited the area on 20 November and observed hot avalanches descending the SW part of a newly erupted viscous lava dome. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Dates are reported in UTC; specific events are in local time where noted.
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Sources: Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Kamchatka Volcanological Station, Institute of Volcanology and Seismology (IVS) of the Far Eastern Branch of the Russian Academy of Sciences (FEB RAS)
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Sakurajima (Kyushu, Japan): Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: EXPLODED AT 20251126/1723Z OVER FL070 STNR OBS VA DTG:26/1720Z
…26 Nov:
The Japan Meteorological Agency (JMA) reported ongoing eruptive activity at Minamidake Crater (Aira Caldera’s Sakurajima volcano) during 17-24 November with 25 eruptive events and eight explosions. Nightly crater incandescence was visible in webcam images. Sulfur dioxide emissions were characterized as extremely high, averaging 3,500 tons per day on 17 November.
Explosions were recorded at 0554 on 17 November, at 0717, at 0732, and at 2305 on November 18, at 1814 on 19 November, at 0027 and 1929 on 21 November, and at 2120 on 24 November. Ash plumes from most of the explosions rose 400-2,400 m above the crater rim and drifted SE and E; no emissions from the 24 November explosion were visible, possibly due to weather conditions. Most of the explosions ejected somewhat large or large blocks as far as 1 km from the vent.
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Eruptive events during 17-19 and 21 November produced ash plumes that rose as high as 2.1 km above the crater rim and drifted E and SE. The Alert Level remained at 3 (on a 5-level scale), and the public was warned to be cautious within 2 km of both the Minimadake and Showa craters.
Sources: Source: Japan Meteorological Agency (JMA)
Suwanose-jima (Ryukyu Islands): The Japan Meteorological Agency (JMA) reported that eruptive activity at Suwanosejima’s Ontake Crater continued during 14-21 November. Incandescence was observed nightly in webcam images and ashfall was reported in Toshima Village (3.5 km SSW). An eruptive event at 2157 on 16 November produced an ash plume that rose 1.5 km above the crater rim and drifted W.
At 0740 on 21 November an eruptive event produced an ash plume that rose 1 km above the crater rim and drifted S. 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.
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Sources: Source: Japan Meteorological Agency (JMA)
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Canlaon (Central Philippines): The Philippine Institute of Volcanology and Seismology (PHIVOLCS) reported that the eruption continued at Kanlaon on 25 November 2025 (local). The alert level remained at “2 – Moderate Level of Volcanic Unrest” (level 2 on a 0–5 level scale).
Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
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Current Alerts:
Observatory alert level: “2 – Moderate Level of Volcanic Unrest” (level 2 on a 0–5 level scale)
…26 Nov:
The Philippine Institute of Volcanology and Seismology (PHIVOLCS) reported continuing eruptive activity at Kanlaon during 18-24 November. The seismic network recorded 1-3 daily volcanic earthquakes during 18-22 November and 26 volcanic earthquakes during 22-23 November. Gas-and-steam emissions of variable densities rose 75-100 m above the crater rim and drifted NW, WNW, SW, and SSW.
Sulfur dioxide emissions ranged from 1,494 to 2,427 tonnes per day. An eight-minute-long ash emission was recorded on 21 November. The Alert Level remained at 2 (on a scale of 0-5); the public was warned to stay out of the 4-km-radius Permanent Danger Zone (PDZ) and pilots were advised to avoid flying close to the summit.
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Sources: Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
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Taal (Luzon, Philippines): The Philippine Institute of Volcanology and Seismology (PHIVOLCS) reported that the eruption continued at Taal on 25 November 2025 (local). The alert level remained at “1 – Low-Level Unrest” (on a 0–5 level scale).
Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
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Current Alerts:
Observatory alert level: “1 – Low-Level Unrest” (on a 0–5 level scale)
Telong (northern Sumatra, Indonesia): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that unrest continued at Telong, Bur ni on 25 November 2025 (local). The alert level was raised to “Level 2 – Alert” (on a 4-level scale) on 25 November 2025 by CVGHM/PVMBG due to increased seismicity.
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: “Level 2 – Alert” (on a 4-level scale)
…26 Nov:
The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported increased seismicity at Bur ni Telong. A M 4.3 tectonic earthquake was recorded at 0030 on 25 November and located about 16 km NE of the main crater. The tectonic earthquake was followed by increased seismicity at Bur ni Telong characterized by a total of 18 deep volcanic earthquakes, six local tectonic earthquakes, and six distant tectonic earthquakes recorded during 0000-0600.
The Alert Level was raised to 2 (the second lowest level on a scale of 1-4) at 0900 on 25 November. The public was advised to maintain a minimum distance of 1.5 km from the crater area and to avoid the fumarole and solfatara regions, especially during cloudy or rainy weather.
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Sources: Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
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Karangetang (Siau Island, Sangihe Islands, Indonesia): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that the eruption continued at Karangetang on 25 November 2025 (local). The alert level remained at “Level 2 – Alert” (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: “Level 2 – Alert” (on a 4-level scale)
Raung (East Java): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that the eruption continued at Raung on 25 November 2025 (local). The alert level remained at “Level 2 – Alert” (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: “Level 2 – Alert” (on a 4-level scale)
Ibu (Halmahera, Indonesia): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 8000 ft (2400 m) altitude or flight level 080 and is moving at 15 kts in SE direction.
The full report is as follows: VA TO FL080 LAST REP AT 26/1142Z EST VA DTG:26/1140Z to 8000 ft (2400 m)
…26 Nov:
The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that the eruption continued at Ibu on 25 November 2025 (local). The alert level remained at “Level 2 – Alert” (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: “Level 2 – Alert” (on a 4-level scale)
…26 Nov:
The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 18-25 November. Eruptive events were recorded daily, though weather conditions sometimes prevented visual confirmation, particularly on 19 and 22 November. Dense gray ash plumes rose 300-1,000 m above the summit and drifted NE and SE during 20-21 and 23-24 November.
Incandescence at the summit was visible in a few nighttime webcam images; notably, Strombolian activity was visible in a webcam image at 2049 on 20 November. The Alert Level remained at 2 (the second lowest level on a four-level scale) and the public was advised to stay 2 km away from the active crater and 3.5 km away from the N crater wall opening.
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Sources: Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
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Sangeang Api (Flores Sea, Indonesia): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that unrest continued at Sangeang Api on 25 November 2025 (local). The alert level remained at “Level 2 – Alert” (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: “Level 2 – Alert” (on a 4-level scale)
…26 Nov:
The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that activity at Sangeang Api increased during 1-22 November. Notably, five tornillo earthquakes were detected and on 18 November there was a significant increase in seismic signals indicating emissions. White, gray, and brown emissions rose as high as 35 m above the crater rim on 20 November, followed by white emissions that rose 15-25 m above the crater rim during 21-22 November.
Seismicity intensified further on 22 November, and a new eruption was confirmed by visual observations of emissions that appeared to be rising from a different vent that had been active in 2014. At 0600 the Alert Level was raised to 2 (on a scale of 1-4) and the public was warned to stay 3 km away from the active crater and additionally from an area on the ESE flank than spanned from the crater to the coastline, 6.5 km away. White-and-gray emissions rose 200-300 m above the crater rim on 23 November.
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Sources: Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
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Lewotobi (Flores): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that the eruption continued at Lewotobi (Laki-Laki) on 25 November 2025 (local). The alert level remained at “Level 4 – Caution” (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: “Level 4 – Caution” (on a 4-level scale)
…26 Nov:
In a special report from 24 November the Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) stated that seismicity at Lewotobi Laki-laki began to increase over the previous few days. The dominant seismic signals, non-harmonic and low-frequency, indicated activity at shallow depths. Increased inflation was detected in tiltmeter data during the previous three days, although Global Navigation Satellite System (GNSS) data continued to show fluctuations in the vertical component over the past week.
Beginning at 1400 on 24 November there was an increase in the number of deep volcanic earthquakes, indicating a rapid rise of magma. At 2100 the Alert Level was raised to 4 (the highest level on a scale of 1-4) and the public was warned to stay 6 km away from the center of Laki-laki and 7 km in an area clockwise from NW to NE.
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Sources: Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
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Soputan (North Sulawesi, Indonesia): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that unrest continued at Soputan on 25 November 2025 (local). The alert level remained at “Level 2 – Alert” (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: “Level 2 – Alert” (on a 4-level scale)
Lewotolo (Lesser Sunda Islands): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that the eruption continued at Lewotolok on 25 November 2025 (local). The alert level remained at “Level 2 – Alert” (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: “Level 2 – Alert” (on a 4-level scale)
Merapi (Central Java, Indonesia): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that the eruption continued at Merapi on 25 November 2025 (local). The alert level remained at “Level 3 – Standby” (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: “Level 3 – Standby” (on a 4-level scale)
Bromo (East Java, Indonesia): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that unrest continued at Tengger Caldera on 25 November 2025 (local). The alert level remained at “Level 2 – Alert” (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: “Level 2 – Alert” (on a 4-level scale)
Semeru (East Java, Indonesia): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 15000 ft (4600 m) altitude or flight level 150, and is moving at 05 kts in SE direction.
The full report is as follows: VA TO FL150, LAST REPORTED AT 26/1045Z EST VA DTG:26/1100Z to 15000 ft (4600 m)
…26 Nov:
The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that the eruption continued at Semeru on 25 November 2025 (local). The alert level remained at “Level 4 – Caution” (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: “Level 4 – Caution” (on a 4-level scale)
…26 Nov:
The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that eruptive activity continued at Semeru during 20-25 November. Eruptive events were recorded during 20-21 and 24 November, but weather conditions prevented visual confirmation. White-and-gray ash plumes rose 500-700 m above the summit and drifted SW on 23 November and rose 500-1,000 m and drifted N on 25 November.
Incandescence at the summit on the upper SE flank was visible in several nighttime webcam images.
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Around 300 residents were evacuated on 19 November after a series of pyroclastic density currents (PDCs) traveled as far as 13 km down the S and SE flanks. Authorities also evacuated 137 climbers who were camping within 8 km of the summit in the Ranu Kumbolo area. By the evening of 20 November there were 1,116 people in evacuation shelters.
There were no fatalities, though three people were significantly burned. Rain continued in the area during 19-21 November. On the evening of 21 November lahars interacted with hot material that had been deposited along the Regoyo River, causing a burst of ash and steam that deposited material on the Piket Zero road, which connects Lumajang (32 km ESE) and Malang (35 km NW).
Marapi (Western Sumatra, Indonesia): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that the eruption continued at Marapi on 25 November 2025 (local). The alert level remained at “Level 2 – Alert” (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: “Level 2 – Alert” (on a 4-level scale)
Dempo (Sumatra): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that unrest continued at Dempo on 25 November 2025 (local). The alert level remained at “Level 2 – Alert” (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: “Level 2 – Alert” (on a 4-level scale)
Dukono (Halmahera): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that the eruption continued at Dukono on 25 November 2025 (local). The alert level remained at “Level 2 – Alert” (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: “Level 2 – Alert” (on a 4-level scale)
Awu (Sulawesi & Sangihe Islands): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that unrest continued at Awu on 25 November 2025 (local). The alert level remained at “Level 2 – Alert” (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: “Level 2 – Alert” (on a 4-level scale)
Kerinci (Sumatra): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that unrest continued at Kerinci on 25 November 2025 (local). The alert level remained at “Level 2 – Alert” (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: “Level 2 – Alert” (on a 4-level scale)
Lokon-Empung (North Sulawesi, Indonesia): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that unrest continued at Lokon-Empung on 25 November 2025 (local). The alert level remained at “Level 2 – Alert” (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: “Level 2 – Alert” (on a 4-level scale)
Yasur (Tanna Island, Vanuatu): The Vanuatu Meteorology and Geohazards Department (VMGD) reported that activity at Yasur continued at a level of “major unrest,” as defined by the Alert Level 2 status (on a scale of 0-5) during November. Mid-to-high-level thermal anomalies were identified in satellite images during 17-19 November as well as gas-and-steam plumes containing ash. The ash-and-gas plume rose to high levels on 20 November based on webcam images.
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.
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Sources: Source: Vanuatu Meteorology and Geohazards Department (VMGD)
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White Island (New Zealand): According to the Wellington Volcanic Ash Advisory Center (VAAC) low-level ash emissions at Whakaari/White Island continued during 20-21 and 24-25 November. Ash plumes rose 0.6-1.5 km (2,000-5,000 ft) a.s.l. and drifted in multiple directions based on pilot observations and satellite images.
A Volcanic Ash Advisory (VAA) issued at 1930 on 25 November noted that a pilot observed ash extending over Maketu (70 km WSW) toward Lake Rotoma (80 km SW).
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Sources: Source: Wellington Volcanic Ash Advisory Center (VAAC)
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Kilauea (Hawai’i): A widely felt earthquake of magnitude 4.6 occurred on Tuesday, November 25, 11:49 p.m. HST local time 9 mi (15 km) south-southeast of Fern Forest on the Island of Hawaiʻi at a depth of 3 mi (5 km) below sea level.
The earthquake had no apparent impact on either Mauna Loa or Kīlauea volcanoes, the volcano observatory wrote: “The event followed the end of episode 37 lava fountaining on Kīlauea by 10 minutes, but does not appear directly related to the eruption. Most earthquakes in this region are caused by movement of the south flank of Kīlauea. The location, depth, and waveforms recorded as part of today’s earthquake are consistent with slip along south flank faults. The USGS Hawaiian Volcano Observatory continues to monitor Hawaiian volcanoes for any changes.”
…26 Nov:
The United States Geological Survey – Hawaiian Volcano Observatory (USGS-HVO) reported that the eruption continued at Kilauea on 25 November 2025 (local). The alert level remained at “Watch” (level 3 on a 4-level scale). The aviation alert level remained at “Orange” (level 3 on a 4-level scale).
Source: United States Geological Survey – Hawaiian Volcano Observatory (USGS-HVO)
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Current Alerts:
Observatory alert level: “Watch” (level 3 on a 4-level scale)
…26 Nov:
The Hawaiian Volcano Observatory (HVO) reported that the eruption within Kilauea’s Kaluapele summit caldera, characterized by episodic fountaining, incandescence, and intermittent spatter from craters along the SW margin of Halema’uma’u Crater, continued at variable levels during 19-24 November. Incandescence at both the N and S vents was visible overnight during 19-21 November. Intermittent spattering at the N vent was visible from 2130 on 20 November to 0030 on 21 November.
Overflows of lava at the S vent began just after 0930 on 21 November and was followed by alternating overflows at both vents through the next morning. About 30 instances of vent overflows occurred in total, with about two-thirds originating at the S vent and one-third originating at the N vent. At 0130 on 22 November one of the overflows at the S vent produced a dome fountain 5-20 m tall that lasted about 25 minutes.
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Overflows at the S vent became frequent throughout the day, occurring about every 15-45 minutes, with each lasting 5-15 minutes. Activity changed by 1800 to less frequent, longer duration (50-70 minutes) overflows that each produced dome fountains of 5-10 m high. During the day on 23 November periodic dome fountain overflows continued at a rate of approximately once per hour, with each overflow lasting about 30-40 minutes.
The overflows stopped at 0010 on 24 November, though strong glow and occasional spatter continued. In total there were 73 overflows from 0930 on 21 November to about 1200 on 24 November. 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).
…26 Nov:
Episode 37 of the ongoing Halemaʻumaʻu eruption ended abruptly at 11:39 p.m. HST on November 25 after 9.2 hours of continuous fountaining.
The north vent stopped erupting at approximately 11:39 p.m. HST marking the end of episode 37. No lava fountains or flows erupted from the south vent during episode 37. Dual lava fountains from the north vent reached maximum heights of 500-600 ft (150-180 m). Continuous fountaining lasted for 9.2 hours and produced an estimated 8.2 million cubic yards (6.3 million cubic meters) of lava. The combined average eruption rate was over 200 cubic yards per second (190 cubic meters per second). Lava flows from the fountains covered about 75% of the floor of Halemaʻumaʻu crater.
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The eruptive plume reached heights of more than 14,000 ft (4,200 m) above sea level during episode 37. Volcanic gas emissions greatly decreased after lava fountaining ended.
The Uēkahuna tiltmeter (UWD) recorded about 16.5 microradians of deflationary tilt during episode 37. The end of lava fountaining was coincident with a rapid change from deflation to inflation at the summit and a decrease in seismic tremor intensity.
…26 Nov:
The newest lava fountaining episode (number 37) has started at the Halemaʻumaʻu summit crater. It began at 2:30 p.m. HST on November 25. Sustained lava fountains approximately 400 feet (120 meters) in height are currently erupting from the north vent. Fountain heights are increasing rapidly, the volcano observatory reported.
“Past episodes have produced incandescent lava fountains over 1000 feet (300 meters) high that produce eruptive plumes up to 20,000 feet (6000 meters) above ground level. According to the National Weather Service, winds are light and blowing from the northeast direction, which suggests that volcanic gas emissions and volcanic material may be distributed towards the southwest, but could spread more widely.
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“All eruptive activity is confined to Halemaʻumaʻu crater within Hawaiʻi Volcanoes National Park; commercial airports in Hawaii County (KOA and ITO) will not be affected by this activity.
Three Kīlauea summit livestream videos that show eruptive lava fountains are available here: youtube.com/@usgs/streams. KPcam and MKcam provide views of the plume height for aviation purposes.
Ahyi (United States, Mariana Islands): The US Geological Survey reported that signs of unrest at Ahyi Seamount were observed during the previous few weeks. A small green-and-white submarine plume of water drifting up to 520 m NE of the volcano was observed in a high-resolution satellite image on 14 November. One signal coming from the direction of Ahyi, possibly related to activity, was identified in data from underwater pressure sensors near Wake Island (about 2,270 km E of Ahyi) on 18 November.
The Aviation Color Code remained at Yellow (the second lowest level on a four-color scale) and the Volcano Alert Level remained at Advisory (the second lowest level on a four-level scale).
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Sources: Source: US Geological Survey
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Shishaldin (Aleutian Islands, Alaska): The United States Geological Survey – Alaska Volcano Observatory (USGS-AVO) reported that unrest continued at Shishaldin between 24 November 2025 (local) and 25 November 2025 (local). The alert level remained at “Advisory” (level 2 on a 4-level scale). The aviation alert level remained at “Yellow” (level 2 on a 4-level scale).
Source: United States Geological Survey – Alaska Volcano Observatory (USGS-AVO)
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Current Alerts:
Observatory alert level: “Advisory” (level 2 on a 4-level scale)
Great Sitkin (United States, Aleutian Islands): The United States Geological Survey – Alaska Volcano Observatory (USGS-AVO) reported that the eruption continued at Great Sitkin between 24 November 2025 (local) and 25 November 2025 (local). The alert level remained at “Watch” (level 3 on a 4-level scale). The aviation alert level remained at “Orange” (level 3 on a 4-level scale).
Source: United States Geological Survey – Alaska Volcano Observatory (USGS-AVO)
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Current Alerts:
Observatory alert level: “Watch” (level 3 on a 4-level scale)
…26 Nov:
The Alaska Volcano Observatory (AVO) reported that slow lava effusion continued to feed a thick flow in Great Sitkin’s summit crater during 18-25 November. Satellite data indicated that both the SW and SE parts of the flow margins had advanced about 10 m during the previous week. Small daily earthquakes were detected by the seismic network.
Weather clouds sometimes obscured satellite and webcam views, though elevated surface temperatures were identified in satellite views on 18 November. 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).
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Sources: Source: US Geological Survey Alaska Volcano Observatory (AVO)
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Popocatépetl (Central Mexico): The Centro Nacional de Prevención de Desastres (CENAPRED) reported that the eruption continued at Popocatépetl between 24 November 2025 (local) and 25 November 2025 (local). The alert level remained at “Yellow Alert – Phase 2” (level 4 on a 7-level scale).
Source: Centro Nacional de Prevención de Desastres (CENAPRED)
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Current Alerts:
Observatory alert level: “Yellow Alert – Phase 2” (level 4 on a 7-level scale)
Santiaguito (Guatemala): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 15000 ft (4600 m) altitude or flight level 150 .
The full report is as follows: VA SEEN IN SAT to 15000 ft (4600 m)
Fuego (Guatemala): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 15000 ft (4600 m) altitude or flight level 150 .
The full report is as follows: ONGOING VA EMS to 15000 ft (4600 m)
Turrialba (Costa Rica): The Observatorio Vulcanológico y Sismológico de Costa Rica – Universidad Nacional (OVSICORI-UNA) reported that unrest continued at Turrialba on 25 November 2025 (local). The alert level remained at “Level 2 – Warning” (on a 0–4 level scale).
Source: Observatorio Vulcanológico y Sismológico de Costa Rica – Universidad Nacional (OVSICORI-UNA)
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Current Alerts:
Observatory alert level: “Level 2 – Warning” (on a 0–4 level scale)
Rincón de la Vieja (Costa Rica): The Observatorio Vulcanológico y Sismológico de Costa Rica – Universidad Nacional (OVSICORI-UNA) reported that unrest continued at Rincón de la Vieja on 25 November 2025 (local). The alert level remained at “Level 2 – Warning” (on a 0–4 level scale). The aviation alert level remained at “Yellow” (level 2 on a 4-level scale).
Source: Observatorio Vulcanológico y Sismológico de Costa Rica – Universidad Nacional (OVSICORI-UNA)
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Current Alerts:
Observatory alert level: “Level 2 – Warning” (on a 0–4 level scale)
Poas (Costa Rica): The Observatorio Vulcanológico y Sismológico de Costa Rica – Universidad Nacional (OVSICORI-UNA) reported that the eruption continued at Poás on 25 November 2025 (local). The alert level remained at “Level 2 – Warning” (on a 0–4 level scale). The aviation alert level remained at “Yellow” (level 2 on a 4-level scale).
Source: Observatorio Vulcanológico y Sismológico de Costa Rica – Universidad Nacional (OVSICORI-UNA)
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Current Alerts:
Observatory alert level: “Level 2 – Warning” (on a 0–4 level scale)
Nevado del Ruiz (Colombia): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: VONA RPRTS OF POSS VA EMS
Puracé (Colombia): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: VA EMS NOT OBSD
…26 Nov:
The Servicio Geológico Colombiano (SGC) reported that unrest continued at Puracé on 25 November 2025 (local). The alert level remained at “Yellow” (level 2 on a 4-level scale).
Source: Servicio Geológico Colombiano (SGC)
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Current Alerts:
Observatory alert level: “Yellow” (level 2 on a 4-level scale)
…26 Nov:
The Servicio Geológico Colombiano (SGC) reported that a new eruption occurred at the volcano yesterday.
At about 05:35 PM local time, dense grey ash emissions mixed with steam and gas rose about 1,7 km above the summit and propagated to the northwest.
A las 5:35 p. m. de este martes 25 de noviembre, el volcán Puracé-cadena volcánica Los Coconucos realizó una emisión de ceniza que alcanzó los 1.7 km de altura. El fenómeno fue observado y grabado por nuestros expertos del Observatorio Vulcanológico y Sismológico de… pic.twitter.com/q3kl34g6q6
— Servicio Geológico Colombiano (@sgcol) November 26, 2025 We would like to show you embedded content from X/Twitter. If you like to see this content, please make sure you agree with the privacy policy of X/Twitter and click the button:
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…26 Nov:
At 0740 on 25 November the Servicio Geologico Colombiano (SGC) reported that increased seismicity at Puracé had been detected for a few hours. The seismicity was characterized by tremor and long-period signals located beneath the crater at depths less than 1 km. The signals were accompanied by gas plumes that rose up to 1.6 km above the summit and drifted SW.
A small amount of ash may have been present in the plumes. The Alert Level remained at Yellow (the second lowest level on a four-color scale).
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Sources: Source: Servicio Geológico Colombiano (SGC)
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Sangay (Ecuador): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 20000 ft (6100 m) altitude or flight level 200 .
The full report is as follows: VA EMS OBSD to 20000 ft (6100 m)
…26 Nov:
The Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN) reported that the eruption continued at Sangay between 24 November 2025 (local) and 25 November 2025 (local). The alert level remained at “2 – Yellow” (on a 4-level scale).
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
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Current Alerts:
Observatory alert level: “2 – Yellow” (on a 4-level scale)
Reventador (Ecuador): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: POSS VA EMS
…26 Nov:
The Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN) reported that the eruption continued at Reventador between 24 November 2025 (local) and 25 November 2025 (local). The alert level remained at “3 – Orange” (on a 4-level scale).
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
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Current Alerts:
Observatory alert level: “3 – Orange” (on a 4-level scale)
Sabancaya (Peru): The Centro Vulcanológico Nacional del Instituto Geofísico del Perú (CENVUL-IGP) reported that the eruption continued at Sabancaya between 24 November 2025 (local) and 25 November 2025 (local). The alert level remained at “Orange” (level 3 on a 4-level scale).
Source: Centro Vulcanológico Nacional del Instituto Geofísico del Perú (CENVUL-IGP)
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Current Alerts:
Observatory alert level: “Orange” (level 3 on a 4-level scale)
Erta Ale (Danakil depression, Ethiopia): (26 Nov) A radar (Sentinel-1 Synthetic Aperture Radar) image from 25 November shows a large new subsidence feature in the summit area of Erta Ale—about 760 × 350 metres in size—formed despite the absence of local eruptive activity. This collapse appears to be a response to the powerful 23 November eruption at Hayli Gubbi, highlighting a mechanical or magmatic connection between the two neighbouring volcanic systems.
Hayli Gubbi (Ethiopia): The Volcanic Ash Advisory Center Global reported that the eruption continued at Hayli Gubbi on 25 November 2025 (local). The Tokyo VAAC reported observing continuous ash emissions to approximately 9,144 m above sea level in HIMAWARI-8 satellite imagery; ash dispersed toward the E.
Current Alerts:
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