USGS Volcano Notice - DOI-USGS-AVO-2025-09-04T18:28:24+00:00

Lava continues to erupt in the summit crater of Great Sitkin Volcano. Occasional small earthquakes were detected over the past day. Nothing of note was observed in partly cloudy to cloudy satellite and views.  Minor steam emissions from the lava dome were observed in webcam images when weather conditions were clear.     

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 and web cameras, and regional infrasound and lightning networks.

Frequent small earthquakes were detected by the local monitoring network at Shishaldin Volcano over the past day. No eruptive activity was observed in partly cloudy to cloudy satellite imagery.  Vapor emissions were observed at the summit in webcam views when weather conditions were clear.  

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 lighting data, and satellite images to detect eruptions.