Alaska Volcano Observatory

The slow eruption of lava in the summit crater of Great Sitkin Volcano continues. Minor seismic activity was observed over the past day with occasional small earthquakes detected. The active portion of the lava flow remains warm and was snow-free and steaming in partly cloudy satellite views.

The current lava flow began erupting in July 2021. No explosive events have occurred since a single event in May 2021.

Local seismic and infrasound sensors and web cameras are used to monitor Great Sitkin along with regional infrasound and lightning networks and satellite data.

Unrest at Shishaldin Volcano continues. Elevated seismicity continues with low-level volcanic tremor and earthquake activity observed over the past day. Minor steaming was observed in mostly cloudy satellite imagery.

The last significant ash-producing eruption occurred in November 2023. 

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.