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

2024: Current Volcano Alert Level: WATCH


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.


Great Sitkin Monitoring

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


Great Sitkin Images