USGS Volcano Notice - DOI-USGS-AVO-2024-04-08T19:30:13+00:00

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

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.

No activity was observed at the Atka volcanic complex in cloudy satellite and webcam views of the volcano over the past day, although a few small earthquakes were detected.

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 weak seismic tremor and small volcanic earthquakes occurred over the past day. Occasional clear web camera views showed a small vapor plume at the volcano's summit. Satellite and web camera views showed no new deposits or elevated surface temperatures.

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.