Aleutians

(52.0765, -176.1109)
2024-05-26 17:40:51 UTC

Slow eruption of lava in the summit crater of Great Sitkin Volcano continues. Small long-period and volcano-tectonic earthquakes continue to occur beneath the volcano. Webcam and satellite views of the volcano were obscured by clouds over the past day. 

The current lava flow eruption began in July 2021. No explosive events have occurred since a single event in May 2021.

Local seismic and infrasound sensors and web cameras are used to monitor Great Sitkin along with regional infrasound and lightning networks and satellite data.

5709 ft (1740m) elevation
Instrumented

Aleutians

(54.7554, -163.9711)
2024-05-26 17:40:51 UTC

Unrest at Shishaldin Volcano continues. Small, low-frequency earthquakes occurred throughout the day. Satellite and webcam views were mostly cloudy. 

Minor rock falls associated with collapse events from the unstable ground in and near the summit crater may generate very small clouds of fine-grained ash that dissipate quickly and leave behind local deposits in the immediate vicinity of the summit. The last significant ash-producing eruption occurred in November 2023. 

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. 

9373 ft (2857m) elevation
Instrumented



The Alaska Volcano Observatory (AVO) is a consortium of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the State of Alaska Division of Geological & Geophysical Surveys.