Alaska Volcano Observatory

Lava continues to erupt slowly within the summit crater of Great Sitkin Volcano. Clouds obscured views of the volcano in satellite and webcam images. A few small earthquakes were detected over the last day, including a few long-period events. 

The current lava eruption began in July 2021 and since then has filled most of the summit crater and advanced into valleys below. There have been no explosions at Great Sitkin Volcano since an event in May 2021. The volcano is monitored using local seismic and infrasound sensors, satellite data and webcams, and regional infrasound and lightning networks.

Long-period earthquakes increased overnight starting at 12:45 am AKST (09:45 UTC) on January 14. This activity prompted an increase of the Aviation Color Code and Volcano Alert Level to YELLOW/ADVISORY this morning at 11:04 am AKST (20:04 UTC). Clear satellite and webcam images do not show any evidence for surface changes or activity. This type of earthquake activity in the past has preceded eruptions, but also has ended without an eruption occurring. 

Pavlof Volcano is monitored by local seismic and infrasound sensors, satellite data, web cameras, and regional infrasound and lightning networks. 

Shishaldin Volcano continues to experience unrest with numerous small earthquakes detected over the past day. Clear webcam images showed a steam plume rising from the summit crater. 

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.