Alaska Volcano Observatory

The slow eruption of lava in the summit crater of Great Sitkin Volcano likely continues. Seismic activity has been low over the past day. Minor and typical steaming from the lava flow vent area was observed in a satellite image from yesterday afternoon. 

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, with occasional periods of volcanic tremor and intermittent earthquake activity observed over the past day. Sulfur dioxide gas emissions and minor steaming from the summit crater was observed in satellites from yesterday afternoon. This is typical for Shishaldin during periods of low-level unrest.

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.