ALASKA VOLCANO OBSERVATORY DAILY UPDATE
U.S. Geological Survey
Tuesday, January 17, 2023, 2:04 PM AKST (Tuesday, January 17, 2023, 23:04 UTC)
Seismic activity is elevated at Semisopochnoi Volcano, with weak tremor being detected. Several small explosion signals were detected on local seismic and infrasound sensors over the past day. No activity was seen in cloudy satellite views. Limited web camera images showed weak steaming from the vent.
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.
Seismicity remained low at Great Sitkin Volcano over the past 24 hours and only a few small earthquakes were detected. No activity was observed in satelllite and webcam views of the volcano. Radar data collected by satellite on January 15 showed that lava continues to erupt in the volcano's summit crater.
Great Sitkin Volcano is monitored by local seismic and infrasound sensors, satellite data, web cameras, and regional infrasound and lightning networks.
No significant eruptive activity was observed at Pavlof Volcano over the past day in clear satellite and webcam views, although extremely weak steaming at the summit was seen. Weak seismicity continues with occasional small local earthquakes detected during the last 24 hours.
Small explosions associated with the current eruption could happen at any time and may be accompanied by small ash plumes within the immediate vicinity of the volcano. The level of unrest at Pavlof Volcano can change quickly and the progression to more significant eruptive activity can occur with little or no warning.
Pavlof Volcano is monitored by local seismic and infrasound sensors, satellite data, web cameras, and regional infrasound and lightning networks.
Numerous 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
Information on all Alaska volcanoes is available at: http://www.avo.alaska.edu.
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Michelle Coombs, Scientist-in-Charge, USGS mcoombs@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.