Aleutians

(52.0765, -176.1109)
2024-02-25 20:24:37 UTC

Slow eruption of lava in the summit crater of Great Sitkin Volcano likely continues. Seismicity was low over the past day with a few earthquakes observed. No activity was observed in cloudy satellite and webcam images.

The current lava flow began erupting in July 2021. No explosive events have occurred since a single event in May 2021.

Local seismic and infrasound sensors and web cameras are used to monitor Great Sitkin along with regional infrasound and lightning networks and satellite data.

5709 ft (1740m) elevation
Instrumented

Aleutians

(51.9242, -177.1623)
2024-02-25 20:24:37 UTC

Seismicity was quiet at Kanaga Volcano over the past day. No activity was observed in cloudy satellite and webcam images. 

A steam-driven explosion occurred at Kanaga on December 18, 2023 and since then, seismic activity at the volcano has been above background. This unrest may mean that the likelihood of explosive ash-producing activity has increased.

Local seismic and infrasound sensors and web cameras are used to monitor Kanaga. AVO also uses regional infrasound and lightning networks as well as satellite data.

4288 ft (1307m) elevation
Instrumented

Aleutians

(51.78887, -178.79368)
2024-02-25 20:24:37 UTC

Seismicity has declined over the past several days but remains slightly elevated with small low frequency earthquakes observed. These earthquakes are not uncommon at Gareloi. No activity was observed in cloudy satellite and webcam images over the past day.

Mount Gareloi persistently emits magmatic gases from a fumarole field on the south crater and commonly exhibits low-level seismic activity. The current increase in seismicity likely reflects a change to the magmatic-hydrothermal system, but it is not clear that the likelihood of a volcanic eruption has increased. AVO will continue to monitor activity to determine if the recent changes are related to influx of new magma or other changes to the magmatic system.

Mount Gareloi is monitored by a local seismic and infrasound network, satellite data, and regional infrasound and lightning-detection networks.

5161 ft (1573m) elevation
Instrumented

Aleutians

(54.7554, -163.9711)
2024-02-25 20:24:37 UTC

Low-level unrest continues at Shishaldin Volcano with occasional small volcanic earthquakes. No activity was observed in cloudy satellite and webcam images from the past day.

No significant eruptive activity has been observed since November 2023. 

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 lighting data, and satellite images to detect eruptions. 

9373 ft (2857m) elevation
Instrumented



The Alaska Volcano Observatory (AVO) is a consortium of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the State of Alaska Division of Geological & Geophysical Surveys.