Alaska Volcano Observatory

Lava continues to erupt slowly within the summit crater of Great Sitkin Volcano. A few small local earthquakes were detected over the past day. Southward motion of the south flank of the lava dome and associated local rockfalls were observed in satellite radar imagery. Weak steaming from the active lava dome was also observed in otherwise mostly cloudy satellite imagery. Webcam views were obscured by clouds. 

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.

Shishaldin Volcano continues to experience unrest with frequent small earthquakes detected over the past day. Weakly elevated surface temperatures and steaming were observed in clear satellite and webcam views of the summit. 

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.