Alaska Volcano Observatory

Lava continues to erupt at Great Sitkin Volcano. Satellite observations from this week show that lava is erupting from the vent area and spreading slowly south, with some rockfalls occurring along the south and east parts of the dome. All activity remains confined within the summit crater. Occasional small earthquakes and rockfalls, probably from the steep lava flow margins, continue to be detected in seismic data. 

The current lava eruption began in July 2021 and has filled most of the summit crater and advanced into valleys below. There have been no explosions at Great Sitkin Volcano since an event in May 2021. The volcano is monitored using local seismic and infrasound sensors, satellite data and web cameras, and regional infrasound and lightning networks.