USGS Volcano Notice - DOI-USGS-AVO-2024-04-04T19:51:45+00:00

The slow eruption of lava in the summit crater of Great Sitkin Volcano continues. Seismicity was low over the past day, and only a few minor earthquakes were detected. Clouds obscured satellite and web camera 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.

Minor unrest at the Atka volcanic complex continues and a few small earthquakes occurred over the past day. Nothing was observed in cloudy satellite and web camera views of the volcano over the past day.

AVO has detected no unusual surface activity since a small explosion at the summit of Korovin volcano on the evening of March 27. 
Korovin is one of the volcanoes that makes up the Atka volcanic complex. 

The Atka volcanic complex is monitored by local seismic and infrasound sensors and webcam, satellite data, and regional lightning detection instruments.

Unrest at Shishaldin Volcano continues. Seismic activity consisting of low-level tremor and small, low-frequency earthquakes occurred over the past day. Clouds obscured satellite views of the volcano over the past day, but diffuse vapor emissions at the summit were evident in clear web-camera views today. 

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.