USGS Volcano Notice - DOI-USGS-AVO-2024-03-31T18:45:40+00:00

Slow eruption of lava in the summit crater of Great Sitkin Volcano continues. Seismicity was low over the past day. Webcam and satellite images were obscured by clouds. 

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. Throughout the past day, seismic activity has remained elevated, and consists of nearly continuous low-level tremor and small frequent low-frequency earthquakes. Cloudy weather obscured views of the volcano in webcam and satellite in webcam images.

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. 

Unrest at the Atka volcanic complex continues. Low-frequency earthquakes and periods of seismic tremor occurred throughout the past 24 hours. Clouds blocked satellite and webcam views. 

AVO has detected no unusual surface activity since a small explosion at the summit of Korovin volcano, one of the volcanoes in the Atka volcanic complex, the evening of March 27. 

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