USGS Volcano Notice - DOI-USGS-AVO-2024-01-25T13:18:38-08:00

ALASKA VOLCANO OBSERVATORY DAILY UPDATE
U.S. Geological Survey
Thursday, January 25, 2024, 12:26 PM AKST (Thursday, January 25, 2024, 21:26 UTC)

GREAT SITKIN (VNUM #311120)
52°4'35" N 176°6'39" W, Summit Elevation 5709 ft (1740 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Slow eruption of lava in the summit crater of Great Sitkin Volcano continues. New lava flow growth to the north of the vent, as well as continued inflation of the lava flow above the vent were observed in satellite radar imagery. Weakly elevated surface temperatures from the lava flow were also observed in partly cloudy satellite images over the last day. Local monitoring network data is offline due to a storm-related power failure.

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, when available. We are currently using regional infrasound and lightning networks as well as satellite data.

SHISHALDIN (VNUM #311360)
54°45'19" N 163°58'16" W, Summit Elevation 9373 ft (2857 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

Unrest continues at Shishaldin Volcano in the form of small volcanic earthquakes. No explosive activity was detected in infrasound data. A small steam plume was observed in partly cloudy to clear satellite and webcam views.

No 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. These mo

KANAGA (VNUM #311110)
51°55'27" N 177°9'44" W, Summit Elevation 4288 ft (1307 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

No activity was observed in cloudy satellite images over the last day. Local monitoring network data is offline due to a storm-related power failure.

A steam-driven explosion occurred at Kanaga on December 18, and the local network recorded small volcanic earthquakes before going offline on January 2. This unrest may mean that the likelihood for ash-producing explosive activity has increased. Ash clouds exceeding 20,000 feet above sea level may develop with little warning.

Local seismic and infrasound sensors and web cameras are used to monitor Great Sitkin, when available. We are currently using regional infrasound and lightning networks as well as satellite data.

CONTACT INFORMATION:

Matt Haney, Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497

David Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 378-5460

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.