U.S. Geological Survey
Saturday, March 30, 2024, 11:31 AM AKDT (Saturday, March 30, 2024, 19:31 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

Slow eruption of lava in the summit crater of Great Sitkin Volcano continues. Seismicity was low over the past day. Webcam and satellite images were obscured by clouds over the past day. 

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.

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 has increased during the past day. This morning, seismic activity is elevated and two tremor bursts occurred at 2:13 to 2:45 AKDT (10:13 to 10:45 UTC) and 7:27 to 7:45 AKDT (15:27 to 15:45 UTC). These were accompanied by infrasound signals, indicating low-level explosive activity may have occurred. Webcam and satellite images have been obscured by clouds today.

AVO will monitor the situation closely for evidence of renewed eruptive activity. 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. 

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

A small number of low-frequency volcanic earthquakes were detected at the Atka volcanic complex over the past day. Satellite and webcam views were blocked by clouds. 

AVO has detected no unusual surface activity since a small explosion at the summit of Korovin volcano, one of the volcanoes in the Atka volcanic complex, the evening of March 27. 

The Atka volcanic complex is monitored by local seismic and infrasound sensors and webcam, satellite data, and regional lightning detection instruments.


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