USGS Volcano Notice - DOI-USGS-AVO-2024-01-29T12:52:19-08:00

Slow eruption of lava in the summit crater of Great Sitkin Volcano continues.

Local monitoring network data was restored yesterday following a storm-related power outage that began in early January. A small number of small volcanic earthquakes were detected since then. No activity observed in satellite imagery that was mostly obscured by clouds over the past day. Webcam images also 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 continues at Shishaldin Volcano in the form of small volcanic earthquakes. No explosive activity was detected in infrasound data. A weak steam plume was observed in clear webcam views.

No 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. These mo

Local monitoring data were restored yesterday. Since then, small volcanic earthquakes were detected. No activity was observed in cloudy satellite images over the last day. 

A steam-driven explosion occurred at Kanaga on December 18, and seismic activity at the volcano has been above background. This unrest may mean that the likelihood for ash-producing explosive activity has increased. Ash clouds exceeding 20,000 feet above sea level may develop with little warning. 

Local seismic and infrasound sensors and web cameras are used to monitor Kanaga. AVO also uses regional infrasound and lightning networks as well as satellite data.