Korovin volcano
Volcano type	stratovolcano
Location	Aleutian Islands (Alaska), 1087 mi (1749 km) West of Anchorage 52.382° N / 174.165° W
Summit elevation	1533 m (5030 ft)
Last eruptions	1829(?), 1844(?), 1907(?), 1951(?), 1953(?), 1973, 1976(?), 1986(?), 1987, 1998, 2005(?), 2006
Typical eruption style	Explosive

Background:

Geologically, Korovin belongs to the Atka volcanic complex on northern Atka Island. The Atka complex comprises a broad ancient central shield volcano, upon which a larger stratovolcano had been built destroyed by caldera formation about 300,000 to 500,000 years ago.
Korovin has two summit vents 0.6 km apart. The northwestern summit vent is a symmetric cone with a small crater. The southeastern summit vent is on the remnant of a cone with a steep-walled crater, about 1 km wide at the rim and at least several hundred meters deep with vertical crater walls. It contains a turquoise green lake with solfataric activity.