ALASKA VOLCANO OBSERVATORY DAILY UPDATE
U.S. Geological Survey
Wednesday, May 4, 2022, 12:28 PM AKDT (Wednesday, May 4, 2022, 20:28 UTC)
No significant seismic activity was detected over the last day, and the volcano was obscured by clouds in satellite and webcam images. Slow lava effusion probably continues. It is possible that new explosive activity could occur with little or no warning.
Great Sitkin is monitored by local seismic and infrasound sensors, satellite data, web cameras, and remote infrasound and lightning networks.
Eruptive activity continues at Pavlof with detection of seismic tremor. No explosions or ash emissions were detected in the last day. Elevated surface temperatures were observed in satellite views and minor steam emissions were observed in web camera views over the past day.
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 can change quickly and the progression to more significant eruptive activity can occur with little or no warning.
Pavlof is monitored by local seismic and infrasound sensors, satellite data, web cameras, and remote infrasound and lightning networks.
Low-level eruptive activity continues. Seismicity remains elevated, but there have been no explosions in last day. The volcano was obscured by clouds in satellite views, but occasional web camera views showed minor, low-level ash emissions.
Small eruptions producing minor ash deposits within the vicinity of the active north crater of Mount Cerberus and ash clouds usually under 10,000 ft (3 km) above sea level have characterized the recent activity. Small explosions and associated ash emissions may continue and could be difficult to detect, especially when thick cloud cover obscures the volcano.
Semisopochnoi is monitored by local seismic and infrasound sensors, satellite data, web cameras, and remote infrasound and lightning networks.
OTHER ALASKA VOLCANOES
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Dave Schneider, Acting Scientist-in-Charge, USGS firstname.lastname@example.org (907) 786-7497
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