U.S. Geological Survey
Tuesday, April 2, 2024, 11:28 AM AKDT (Tuesday, April 2, 2024, 19:28 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

The slow eruption of lava in the summit crater of Great Sitkin Volcano continues. Seismicity was low over the past day, and only a few minor earthquakes were detected. Clouds obscured webcam and satellite views of the volcano. 

The current lava flow began erupting 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.

52°19'51" N 174°8'20" W, Summit Elevation 5030 ft (1533 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

Unrest at the Atka volcanic complex continues. Periods of low-level seismic tremor occurred over the past day, but wind noise partially obscured the signal. Clouds obscured satellite and webcam views of the volcano.

AVO has detected no unusual surface activity since a small explosion at the summit of Korovin volcano on the evening of March 27. 
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.

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

Unrest at Shishaldin Volcano continues. Seismic activity consisting of low-level tremor and small, low-frequency earthquakes occurred over the past day. Clear to cloudy satellite views of the volcano showed nothing noteworthy. Clear web camera views of the volcano showed possible diffuse vapor emissions at 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