Amukta (United States)

Status Normal Eruption 1997 1066m
Stratovolcano (Subduction zone / Intermediate crust (15-25 km))

The symmetrical Amukta stratovolcano lies in the central Aleutians SW of Chagulak Island and is the westernmost of the Islands of the Four Mountains group. Amukta was constructed at the northern side of an arcuate caldera-like feature that is open to the sea along the southern coast of the 8-km-wide Amukta Island. The 1066-m-high stratovolcano overlies a broad shield volcano and is topped by a 400-m-wide crater. A cinder cone is located near the NE coast. Amukta has had several eruptions in historical time from both summit and flank vents.

Symmetrical snow-capped Amukta stratovolcano in the central Aleutian Islands is located at the northern side of an arcuate caldera-like feature along the coast of the 8-km-wide island of the same name. The 1066-m-high stratovolcano overlies a broad shield volcano and is topped by a 400-m-wide crater. Amukta has had several eruptions since the late 18th century from both summit and flank vents.

Photo by U.S. Fish and Wildlife Service, 1972 (courtesy of Alaska Volcano Observatory).

Last updated 2019-08-04 00:28:03