Newest Volcano Notice Including Spurr

Lava continues to erupt in the summit crater of Great Sitkin Volcano. Seismicity remains at low levels with occasional small earthquakes being detected. Elevated surface temperatures were observed in satellite imagery over the past day, and satellite radar images show continued growth of the lava flow to the southwest. Webcam views were cloudy over the past day.  

The current eruption of Great Sitkin Volcano began with a single explosive event in May 2021. The ongoing eruption of lava at the summit began shortly afterward, in July 2021. The volcano is monitored using local seismic and infrasound sensors, satellite data and web cameras, and regional infrasound and lightning networks.

Unrest continues at Mount Spurr, with occasional, small volcanic earthquakes occurring beneath the edifice. No activity was observed in clear satellite and webcam views from the past day. 

Fluctuations in unrest are common at volcanoes and eruptive activity remains possible, but unlikely. Should unrest escalate towards an eruption, we expect to observe increases in seismic activity, gas emissions, surface deformation, and surface heating.

The volcano is monitored using local seismic, infrasound, web camera, and GNSS (GPS) stations along with regional infrasound, lightning networks, and satellite data.