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. Typical elevated surface temperatures were observed in satellite data over the past day. Web camera views of the volcano were obscured by clouds.

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 significant changes or activity observed in satellite and web camera images over the past day.

Although low-level unrest continues, no changes have been observed in the monitoring data to indicate that the volcano is moving closer to an eruption. Based on previous eruptions, changes from current activity in the earthquakes, ground deformation, summit lake conditions, and fumarolic activity would be expected if magma began to move closer to the surface. Therefore, if an eruption occurred, it would be preceded by additional signals allowing warning.

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