ALASKA VOLCANO OBSERVATORY DAILY UPDATE
U.S. Geological Survey
Saturday, February 7, 2026, 9:43 AM AKST (Saturday, February 7, 2026, 18:43 UTC)
Lava continues to erupt slowly within the summit crater of Great Sitkin Volcano. A few local seismic events occurred over the past day, but the volcano was mostly quiet. Clear satellite images of the volcano showed elevated surface temperatures associated with the ongoing lava effusion. Web camera views were obscured by clouds over the past day.
The current lava eruption began in July 2021 and, since then, has filled most of the summit crater and advanced into valleys below. There have been no explosions at Great Sitkin Volcano since an event in May 2021. The volcano is monitored using local seismic and infrasound sensors, satellite data, webcams, and regional infrasound and lightning networks.
To view monitoring data and other information about Great Sitkin: https://avo.alaska.edu/volcano/great-sitkin
Shishaldin Volcano continues to experience unrest. Over the past day, seismic activity has been slightly elevated, with numerous small earthquakes, volcanic tremor, and infrasound detections. Web camera views of the volcano have been obscured by clouds over the past day. Satellite imagery from the past day shows no significant changes or noteworthy features under cloudy conditions.
Local seismic and infrasound sensors, web cameras, and a geodetic network are used to monitor Shishaldin Volcano. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lightning data, and satellite images to detect eruptions.
To view monitoring data and other information about Shishaldin: https://avo.alaska.edu/volcano/shishaldin
Matt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497
David Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460
Contact AVO: https://avo.alaska.edu/contact
The Alaska Volcano Observatory is a cooperative program of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys.
ALASKA VOLCANO OBSERVATORY WEEKLY UPDATE
U.S. Geological Survey
Friday, February 6, 2026, 10:41 AM AKST (Friday, February 6, 2026, 19:41 UTC)
Lava continues to slowly erupt within the summit crater at Great Sitkin Volcano. The volcano was obscured by clouds all week. Seismic activity remains low, with occasional small earthquakes and rockfalls detected.
The current lava eruption began in July 2021 and has filled most of the summit crater and advanced into the valleys below. There have been no explosions at Great Sitkin Volcano since an event in May 2021. The volcano is monitored using local seismic and infrasound sensors, satellite data, and web cameras, and regional infrasound and lightning networks.
Great Sitkin Volcano is a basaltic andesite volcano that occupies most of the northern half of Great Sitkin Island, a member of the Andreanof Islands group in the central Aleutian Islands. It is located 26 miles (42 km) east of the community of Adak. The volcano is a composite structure consisting of an older dissected volcano and a younger parasitic cone with a ~1 mile (1.6 km)-diameter summit crater. A steep-sided lava dome, emplaced in the crater during an eruption in 1974, has been mostly buried by the ongoing eruption. The 1974 eruption produced at least one ash cloud that likely exceeded an altitude of 25,000 ft (7.6 km) above sea level. A poorly documented eruption also occurred in 1945, producing a lava dome that was partially destroyed in the 1974 eruption. Within the past 280 years a large explosive eruption produced pyroclastic flows that partially filled the Glacier Creek valley on the southwest flank.
Signs of volcanic unrest at Shishaldin Volcano continued this week. Low-level seismic activity, including frequent small earthquakes and volcanic tremor, was detected throughout the week. Infrasound signals, likely caused by gas bubbles bursting deep within the volcanic vent, were also detected occasionally this week. A steam and gas plume was observed in webcam views when the weather was clear. Sulfur dioxide plumes were detected several times during the week. These emissions originate from the degassing of shallow magma.
Shishaldin Volcano is monitored by local seismic and infrasound sensors, web cameras, and a telemetered geodetic network. In addition to the local monitoring network, the Alaska Volcano Observatory uses nearby geophysical networks, regional infrasound and lightning data, and satellite data to monitor the volcano.
Shishaldin Volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a conical stratovolcano with a base diameter of approximately 10 miles (16 km). It is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest, including over 28 confirmed eruptions since 1824. Most eruptions are relatively small, although activity during the 1999 and 2023 eruptions generated ash columns that reached up to 46,000 ft (16 km) above sea level.
Matt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497
David Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460
Contact AVO: https://avo.alaska.edu/contact
The Alaska Volcano Observatory is a cooperative program of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys.
CASCADES VOLCANO OBSERVATORY WEEKLY UPDATE
U.S. Geological Survey
Friday, February 6, 2026, 1:26 PM PST (Friday, February 6, 2026, 21:26 UTC)
Activity Update: All volcanoes in the Cascade Range of Oregon and Washington are at normal background activity levels. These include Mount Baker, Glacier Peak, Mount Rainier, Mount St. Helens, and Mount Adams in Washington State and Mount Hood, Mount Jefferson, Three Sisters, Newberry, and Crater Lake in Oregon.
Past Week Observations: During the past week, small earthquakes were detected at Mount Rainier, Mount St. Helens, Mount Adams, and Mount Hood. All monitoring data are consistent with background activity levels in the Cascade Range.
The U.S. Geological Survey Cascades Volcano Observatory and the University of Washington Pacific Northwest Seismic Network continue to monitor Washington and Oregon volcanoes closely and will issue additional notifications as warranted.
Website Resources
For images, graphics, and general information on Cascade Range volcanoes: https://www.usgs.gov/observatories/cvo
For seismic information on Oregon and Washington volcanoes: http://www.pnsn.org/volcanoes
For information on USGS volcano alert levels and notifications: https://www.usgs.gov/programs/VHP/volcano-notifications-deliver-situational-information
Seth Moran, Scientist-in-Charge, Cascades Volcano Observatory, smoran@usgs.gov
General inquiries: askCVO@usgs.gov
Media inquiries: volcanomedia@usgs.gov
HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE
U.S. Geological Survey
Saturday, February 7, 2026, 9:08 AM HST (Saturday, February 7, 2026, 19:08 UTC)
Activity Summary:
The Halemaʻumaʻu eruption of Kīlauea is paused. Summit inflation continued over the past day at variable rates. Intermittent glow at the south vent was visible in the webcams overnight, and pulsating seismic tremor bursts have returned. The forecast for the onset of episode 42 lava fountaining is between February 11 and 15 based on current rates of summit inflation.
No significant activity has been noted along Kīlauea’s East Rift Zone or Southwest Rift Zone.
Significant changes in activity between Daily Updates are posted here: https://www.usgs.gov/observatories/hvo/observatory-messages
Summit Observations:
Steady glow at the south vent switched to intermittent periods of moderate to strong glow after about 10 p.m., likely correlated with the return of seismic tremor bursts and suggestive of gas pistoning in the conduit.
Seismic tremor continued over the past 24 hours, and recurring pulses of increased tremor returned around 10 p.m., suggesting the onset of gas pistoning in the conduit. Earthquake activity at Kīlaueaʻs summit was low over the past 24 hours.
The Uēkahuna tiltmeter (UWD) has recorded 23.7 microradians of inflationary tilt since the end of episode 41. Tilt rates have fluctuated over the past day, and a period of slight deflation resulted in just 0.5 microradians of inflationary tilt in the past 24 hours.
The sulfur dioxide (SO2) emission rate from the summit was last measured on February 2 at 5,172 tonnes per day, which is slightly higher than the typical range of 1,000 to 5,000 tonnes of SO2 per day observed during previous eruptive pauses. This is considerably lower than rates observed during lava fountaining episodes. Areas near Kīlauea summit including Hawai'i Volcanoes National Park and nearby communities have recently experienced higher than usual levels of vog (volcanic air pollution) due to light and variable winds. The National Weather Service forecast indicates southeast winds later today at 5-9 mph.
Rift Zone Observations:
Rates of seismicity and ground deformation remain very low in the East Rift Zone and Southwest Rift Zone. SO2 emissions from the East Rift Zone remain below the detection limit.
Analysis:
The rapid rebound of inflationary tilt, glow from the vents, and presence of low-level volcanic tremor after episode 41 indicate that another lava fountaining episode is likely. Models are suggesting that episode 42 is likely to start within the forecast window of February 11 to 15. The forecast window may change if the inflation rate changes.
Kīlauea has been erupting episodically since December 23, 2024, primarily from two vents (north and south) in Halema‘uma‘u. Eruptive episodes, which generally last for less than 12 hours, are separated by pauses that can be as long as over two weeks.
HVO continues to closely monitor Kīlauea and is in contact with Hawai‘i Volcanoes National Park and the Hawai‘i County Civil Defense Agency about eruptive hazards.
Please see the Hawaiʻi Volcanoes National Park website for visitor information: https://www.nps.gov/havo/index.htm
Recap of episode 41:
Episode 41 of the ongoing Halemaʻumaʻu eruption began around 11:10 a.m. HST on January 24, 2026, marked by a sharp increase in tremor and deflationary tilt at recorded at the Uēkahuna tiltmeter (UWD). North and south vent fountain heights peaked just after 12:30 p.m., with maximum fountain heights during the episode estimated at around 460 to 480 m (1500 to 1575 feet). Post-episode analyses of webcam imagery shows that the fountains reached at least 450 m (1475 feet). Fountains from both vents remained relatively close in size during the eruption but began slowly declining after 1:00 p.m. HST. Widespread tephra fall was reported in the National Park and surrounding areas including communities to the north of the National Park. Fine ash was reported falling as far away as Hilo and coastal areas of Puna.
Episode 41 lava fountaining from the north vent stopped at approximately 7:26 p.m. HST on January 24. The south vent dropped rapidly, then jetted back up for 30 seconds just prior to the eruption ceasing at 7:29 p.m. HST January 24. Episode 41 ended after 8 hours and 18 minutes with both the north and south vents active for most of the eruption. The highest peak or instantaneous effusion rate of 1050 cubic yards (800 cubic meters) per second occurred just after 12:30 p.m. HST on January 24. Episode 41 ended with an average effusion rate of 470 cubic yards per second (360 cubic meters per second). An estimated 14 million cubic yards (11 million cubic meters) of lava erupted and covered about 80-85% of Halemaʻumaʻu crater floor. The Uēkahuna tiltmeter (UWD) recorded about 31 microradians of deflationary tilt during episode 41.
Tephra was reported in communities including Volcano Village, Mauna Loa Estates, Ohia Estates, Mountain View, Fern Acres, Kurtistown, Ainaloa Estates, Hilo, Hawaiian Paradise Parks, Hawaiian Beaches, and Pahoa. Tephra fall in more distant communities (Mountain View, Fern Acres, Kurtistown, Ainaloa Estates, Hilo, Hawaiian Paradise Parks, Hawaiian Beaches, and Pahoa) is fine-grained ash and Pele's hair. Falling tephra can pose a health hazard and may contaminate catchment water supplies. See this State of Hawaiʻi Department of Health release for more information. https://governor.hawaii.gov/newsroom/news-release-doh-urges-caution-with-elevated-volcanic-gas-emissions/.
Resources:
The following links provide more information about the current eruption that began on December 23, 2024:
Hazards:
This episodic eruption is occurring within a closed area of Hawai'i Volcanoes National Park.
Other significant hazards also remain around Kīlauea caldera from Halemaʻumaʻu crater wall instability, ground cracking, and rockfalls that can be enhanced by earthquakes. This underscores the extremely hazardous nature of Kīlauea's caldera rim surrounding Halemaʻumaʻu crater, an area that has been closed to the public since late 2007.
More Information:
The Hawaiian Volcano Observatory is one of five volcano observatories within the U.S. Geological Survey and is responsible for monitoring volcanoes and earthquakes in Hawaiʻi and American Samoa.
Subscribe to these messages: https://volcanoes.usgs.gov/vns2/
Summary of volcanic hazards from eruptions: https://www.usgs.gov/observatories/hvo/hazards
Recent earthquakes in Hawaiʻi (map and list): https://www.usgs.gov/observatories/hvo
Explanation of Volcano Alert Levels and Aviation Color Codes: https://www.usgs.gov/programs/VHP/volcanic-alert-levels-characterize-conditions-us-volcanoes
HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE
U.S. Geological Survey
Friday, February 6, 2026, 9:17 AM HST (Friday, February 6, 2026, 19:17 UTC)
Activity Summary:
The Halemaʻumaʻu eruption of Kīlauea is paused. Summit inflation continued over the past day at a steady rate. Weak glow at the south vent was visible in the webcams overnight. The forecast for the onset of episode 42 lava fountaining is between February 11 and 15 based on current rates of summit inflation.
No significant activity has been noted along Kīlauea’s East Rift Zone or Southwest Rift Zone.
Significant changes in activity between Daily Updates are posted here: https://www.usgs.gov/observatories/hvo/observatory-messages
Summit Observations:
Weak glow at the south vent returned this morning at about 3:30 a.m., following an absence of glow the previous night. A brief burst of glow was also seen last night at the north vent around 9:38 p.m.
Seismic tremor continued over the past 24 hours. Recurring pulses of increased tremor have ceased over the past day, with seismic tremor relatively steady. Earthquake activity at Kīlaueaʻs summit was low over the past 24 hours.
The Uēkahuna tiltmeter (UWD) has recorded 23.2 microradians of inflationary tilt since the end of episode 41, including 1.8 microradians of inflationary tilt in the past 24 hours.
The sulfur dioxide (SO2) emission rate from the summit was last measured on February 2 at 5,172 tonnes per day, which is slightly higher than the typical range of 1,000 to 5,000 tonnes of SO2 per day observed during previous eruptive pauses. This is considerably lower than rates observed during lava fountaining episodes. Areas near Kīlauea summit including Hawai'i Volcanoes National Park and nearby communities have been experiencing higher than usual levels of vog (volcanic air pollution) due to ongoing light and variable winds. The National Weather Service forecast indicates south southwest winds today at 7-11 mph.
Rift Zone Observations:
Rates of seismicity and ground deformation remain very low in the East Rift Zone and Southwest Rift Zone. SO2 emissions from the East Rift Zone remain below the detection limit.
Analysis:
The rapid rebound of inflationary tilt, glow from the vents, and presence of low-level volcanic tremor after episode 41 indicate that another lava fountaining episode is likely. Models are suggesting that episode 42 is likely to start within the forecast window of February 11 to 15. The forecast window may change if the inflation rate changes.
Kīlauea has been erupting episodically since December 23, 2024, primarily from two vents (north and south) in Halema‘uma‘u. Eruptive episodes, which generally last for less than 12 hours, are separated by pauses that can be as long as over two weeks.
HVO continues to closely monitor Kīlauea and is in contact with Hawai‘i Volcanoes National Park and the Hawai‘i County Civil Defense Agency about eruptive hazards.
Please see the Hawaiʻi Volcanoes National Park website for visitor information: https://www.nps.gov/havo/index.htm
Recap of episode 41:
Episode 41 of the ongoing Halemaʻumaʻu eruption began around 11:10 a.m. HST on January 24, 2026, marked by a sharp increase in tremor and deflationary tilt at recorded at the Uēkahuna tiltmeter (UWD). North and south vent fountain heights peaked just after 12:30 p.m., with maximum fountain heights during the episode estimated at around 460 to 480 m (1500 to 1575 feet). Post-episode analyses of webcam imagery shows that the fountains reached at least 450 m (1475 feet). Fountains from both vents remained relatively close in size during the eruption but began slowly declining after 1:00 p.m. HST. Widespread tephra fall was reported in the National Park and surrounding areas including communities to the north of the National Park. Fine ash was reported falling as far away as Hilo and coastal areas of Puna.
Episode 41 lava fountaining from the north vent stopped at approximately 7:26 p.m. HST on January 24. The south vent dropped rapidly, then jetted back up for 30 seconds just prior to the eruption ceasing at 7:29 p.m. HST January 24. Episode 41 ended after 8 hours and 18 minutes with both the north and south vents active for most of the eruption. The highest peak or instantaneous effusion rate of 1050 cubic yards (800 cubic meters) per second occurred just after 12:30 p.m. HST on January 24. Episode 41 ended with an average effusion rate of 470 cubic yards per second (360 cubic meters per second). An estimated 14 million cubic yards (11 million cubic meters) of lava erupted and covered about 80-85% of Halemaʻumaʻu crater floor. The Uēkahuna tiltmeter (UWD) recorded about 31 microradians of deflationary tilt during episode 41.
Tephra was reported in communities including Volcano Village, Mauna Loa Estates, Ohia Estates, Mountain View, Fern Acres, Kurtistown, Ainaloa Estates, Hilo, Hawaiian Paradise Parks, Hawaiian Beaches, and Pahoa. Tephra fall in more distant communities (Mountain View, Fern Acres, Kurtistown, Ainaloa Estates, Hilo, Hawaiian Paradise Parks, Hawaiian Beaches, and Pahoa) is fine-grained ash and Pele's hair. Falling tephra can pose a health hazard and may contaminate catchment water supplies. See this State of Hawaiʻi Department of Health release for more information. https://governor.hawaii.gov/newsroom/news-release-doh-urges-caution-with-elevated-volcanic-gas-emissions/.
Resources:
The following links provide more information about the current eruption that began on December 23, 2024:
Hazards:
This episodic eruption is occurring within a closed area of Hawai'i Volcanoes National Park.
Other significant hazards also remain around Kīlauea caldera from Halemaʻumaʻu crater wall instability, ground cracking, and rockfalls that can be enhanced by earthquakes. This underscores the extremely hazardous nature of Kīlauea's caldera rim surrounding Halemaʻumaʻu crater, an area that has been closed to the public since late 2007.
More Information:
The Hawaiian Volcano Observatory is one of five volcano observatories within the U.S. Geological Survey and is responsible for monitoring volcanoes and earthquakes in Hawaiʻi and American Samoa.
Subscribe to these messages: https://volcanoes.usgs.gov/vns2/
Summary of volcanic hazards from eruptions: https://www.usgs.gov/observatories/hvo/hazards
Recent earthquakes in Hawaiʻi (map and list): https://www.usgs.gov/observatories/hvo
Explanation of Volcano Alert Levels and Aviation Color Codes: https://www.usgs.gov/programs/VHP/volcanic-alert-levels-characterize-conditions-us-volcanoes