Aleutians
(52.0765, -176.1109)Lava continues to erupt slowly in the summit crater of Great Sitkin Volcano. Small earthquakes continue at a fairly low rate. No unusual activity observed in satellite data over the past day. Steam emissions were observed in web camera views.
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.
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Cook Inlet-South Central
(61.2989, -152.2539)Unrest continues at Mount Spurr, with numerous small, shallow volcanic earthquakes detected beneath the volcano. Minor steam emissions could be observed in the ANCW camera over the past day. Satellite observations were mostly clear over the past day, but did not show unusual activity.
AVO continues to monitor activity at Mount Spurr for signals that would 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, and fumaroles would be expected if magma began to move closer to the surface. Therefore, it is very likely that if an eruption were to occur it would be preceded by additional signals that would allow advance warning.
The volcano is monitored using local seismic, infrasound, web camera, and GNSS stations along with regional infrasound, lightning networks and satellite data.
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Aleutians
(52.3309, -174.139)Activity remains low at the Atka volcanic complex. Several small local seismic events were observed over the past day, but the overall level of seismicity is very low. No unusual activity observed in satellite or web camera views.
AVO has detected no activity since a small explosion at the summit of Korovin Volcano on the evening of February 20. Korovin is one of the volcanoes that makes up the Atka volcanic complex.
The Atka volcanic complex is monitored by local seismic and infrasound sensors and webcam, satellite data, and regional lightning detection instruments.
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