ALASKA VOLCANO OBSERVATORY DAILY UPDATE
U.S. Geological Survey
Tuesday, January 31, 2023, 10:40 AM AKST (Tuesday, January 31, 2023, 19:40 UTC)
No activity was observed at Great Sitkin in cloudy satellite data from the past day. Satellite-based radar from January 26 showed continued growth of the summit lava field to the east. Seismicity remained low over the past 24 hours.
Great Sitkin Volcano is monitored by local seismic and infrasound sensors, satellite data, web cameras, and regional infrasound and lightning networks.
Seismicity remains slightly elevated with weak tremor observed over the past day. Discoloration of the snow observed at the summit of Mount Young in webcam imagery over the past days is still present and may be indicative of minor low-level explosive activity at the vent. No activity was observed in cloudy satellite data.
Small eruptions producing minor ash deposits within the vicinity of the active north crater of Mount Young and ash clouds usually under 10,000 ft (3 km) above sea level have characterized the recent activity. Additional ash-producing events could occur again with little warning.
Semisopochnoi volcano is monitored by local seismic and infrasound sensors, satellite data, web cameras, and regional infrasound and lightning networks.
A few small, local earthquakes were detected at Takawangha volcano over the past day. No signs of unrest were seen in cloudy satellite views of the volcano.
Takawangha volcano is monitored by local seismic and infrasound sensors, satellite data, and regional infrasound and lightning networks.
OTHER ALASKA VOLCANOES
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Matt Haney, Acting Scientist-in-Charge, USGS firstname.lastname@example.org (907) 786-7497
Jessica Larsen, Acting Coordinating Scientist, UAFGI email@example.com (907) 378-5460
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