Alaska Volcano Observatory

Unrest at Shishaldin Volcano continues. Steaks of ash were observed on the snow-covered flanks of the volcano yesterday afternoon.  The ash may have been deposited on Friday based on further analysis of web camera imagery and geophysical data.  No ash clouds were detected in satellite or web camera views.  Very small explosions were detected in infrasound data and seismicity consists of occasional periods of volcanic tremor and intermittent earthquake activity over the past day. 

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. 

The slow eruption of lava in the summit crater of Great Sitkin Volcano likely continues. Seismic activity has been low over the past day. No unusual activity was observed in satellite and web camera 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.