Great Sitkin

 

Great Sitkin Volcano, located on the Alaskan island of the same name, is a geologically active stratovolcano that forms part of the Aleutian Islands volcanic arc. This andesitic volcano resides within a caldera constructed over the remnants of a more ancient shield volcano. Great Sitkin displays a history of frequent eruptions, with at least a dozen events suspected since the 18th century. Recent volcanic activity includes a significant eruption in 1974 and ongoing lava dome formation since 2021.

Location:	Aleutian Islands, United States
Coordinates:	52.051615, -176.099679
Volcano Type:	Stratovolcano

 

Great Sitkin’s Location

 

Great Sitkin’s Latest Status

2026: Current Volcano Alert Level: WATCH. Slow lava effusion continues at Great Sitkin, confirmed by radar and snow-free summit steam.

 

Great Sitkin’s Eruptive History

 

Year	Overview
1796	Possible eruption (reports of ashfall, precise nature of activity uncertain)
1830	Possible eruption (unconfirmed reports)
1910	Possible eruption (unconfirmed reports)
1942	Eruption (observation of possible steam and ash plumes)
1943	Eruption (unconfirmed, but likely continuation of 1942 event)
1957	Eruption (activity uncertain, potential ash emissions)
1962	Eruption (unconfirmed, suspected due to remote reports)
1964	Eruption (unconfirmed, suspected due to remote reports)
1974	Significant eruption (explosive event, ashfall, formation of a lava dome within the summit crater)
2021	Onset of lava dome formation (initially explosive eruption, followed by ongoing lava flow and dome growth)
2022	Lava dome contiues to grow. Slow lava effusion.
2023	Slow lava effusion continues
2024	Lava effusion continues. Low seismicity.
2026	Slow lava effusion continues at Great Sitkin, confirmed by radar and snow-free summit steam.

 

Great Sitkin Monitoring

For monitoring of United States Volcanoes, please refer to USGS.

 

Great Sitkin Images