Mount Aniakchak

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Mount Aniakchak

Mount Aniakchak caldera
Elevation 4,398 feet (1,341 m)
Location Alaska, USA
Range Aleutian Range
Coordinates 56°51′35.9″N, 158°07′51.5″W
Topo map USGS Chignik D-1
Type Volcanic caldera
Last eruption 1931

Mount Aniakchak is a caldera (about 10 km in diameter) located in the Aleutian Range of Alaska, United States. The area around the volcano is the Aniakchak National Monument and Preserve, maintained by the National Park Service.

Aniakchak is an extant volcano - at least ten lava flows have occurred since the formation of the caldera during a major eruption of VEI=6 in 1645 B.C.[1]; the most recent was in 1931.

Surprise Lake within the caldera is the source of the Aniakchak River, a National Wild River.

Map showing volcanoes of Alaska Peninsula.
Map showing volcanoes of Alaska Peninsula.
Aniakchak Caldera
Aniakchak Caldera


In November of 1967, Aniakchak Caldera was designated as a National Natural Landmark by the National Park Service.

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  1. ^ Pearce, N. J. G., J. A. Westgate, S. J. Preece, W. J. Eastwood, and W. T. Perkins (2004). "Identification of Aniakchak (Alaska) tephra in Greenland ice core challenges the 1645 BC date for Minoan eruption of Santorini". Geochem. Geophys. Geosyst. 5: Q03005. doi:10.1029/2003GC000672. 

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