U.S. Geological Survey
Thursday, July 4, 2024, 10:44 AM AKDT (Thursday, July 4, 2024, 18:44 UTC)

52°4'35" N 176°6'39" W, Summit Elevation 5709 ft (1740 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

No significant changes seen at Great Sitkin Volcano where lava continues to slowly erupt within the summit crater. Over the past day, a few earthquakes were detected beneath the volcano. Satellite and web camera views of the volcano have been obscured by clouds.

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.

54°45'19" N 163°58'16" W, Summit Elevation 9373 ft (2857 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

No major changes have occurred in the last day at Shishaldin Volcano where minor volcanic unrest continues. Small, low-frequency earthquakes and seismic tremor are occurring and during periods with low wind, minor infrasound signals are detected, possibly coming from very small explosions occurring deep in the volcanic conduit. Nothing noteworthy was observed in clear satellite views of the volcano over the past day. Web camera images of the volcano show a persistent steam plume at the summit.

Minor rock falls associated with gravitational collapse of the unstable ground in and near the summit crater may occur without warning. The collapse events can generate small clouds of dust likely composed of fine-grained ash. The diffuse dust clouds dissipate quickly and can produce irregular-shaped deposits near 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. 


Matt Haney, Scientist-in-Charge, USGS (907) 786-7497

David Fee, Coordinating Scientist, UAFGI (907) 378-5460

The Alaska Volcano Observatory is a cooperative program of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys.

Hazard Notification System (HANS) for Volcanoes at