USGS Volcano Notice - DOI-USGS-AVO-2024-03-18T19:45:29+00:00

Slow eruption of lava in the summit crater of Great Sitkin Volcano continues. Seismicity was low over the past day. Satellite radar imagery from the past day showed advance of the active northwest lava flow, continued supply of lava into the eastern lava flow, and uplift of the center of the lava dome above the vent. No other significant activity was observed in mostly cloudy views of the volcano over the past day. 

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.

Low-level unrest continues at Shishaldin Volcano. Seismicity has been at low levels over the past day. A persistent steam and gas plume was observed in several clear web camera and satellite views. There is no evidence that the plume contains ash or that an ash eruption is imminent.

No significant eruptive activity has been observed since 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.