Alaska Volcano Observatory

Lava continues to erupt in the summit crater of Great Sitkin Volcano. Low-level seismicity continues with occasional small earthquakes. No activity was observed in cloudy satellite and webcam views 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.

Low-level unrest continues at Mount Spurr with occasional, small earthquakes occurring beneath the volcano. No activity was observed in webcam images and cloudy 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.