Alaska Volcano Observatory

Slow lava effusion continues within the Great Sitkin summit crater. Over the past day, seismic data recorded frequent rockfalls from the growing lava dome. Web camera and satellite views were mostly cloudy but moderately elevated surface temperatures were observed in several partly cloudy satellite views.  

The current lava eruption began in July 2021 and, since then, 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, webcams, and regional infrasound and lightning networks.

Unrest persists at Shishaldin Volcano, with seismic and infrasound activity remaining elevated over the past day. Satellite data detected a sulfur dioxide gas plume. Nothing unusal was observed in cloudy to partly cloudy satellite and web camera views.    

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 lightning data, and satellite images to detect eruptions.