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Location of Korovin volcano (map created by Janet Schaefer, courtesy of Alaska Volcano Observatory / Alaska Division of Geological & Geophysical Surveys)
Location of Korovin volcano (map created by Janet Schaefer, courtesy of Alaska Volcano Observatory / Alaska Division of Geological & Geophysical Surveys)

Korovin Volcano, Aleutian Islands erupts
AP press photo (provided by Louis and Kathleen Nevzoroff via USGS) of Korovin eruption on 23 Feb., 2005.
Saturday, Feb 26, 2005

Added on 10 March:


AVO did not receive reports of activity at Korovin volcano in the Atka volcani... [more]

Korovin volcano

stratovolcano 1533 m (5030 ft)
Alaska & Aleutians, world, 52.38°N / -174.17°W
Current status: (probably) extinct (0 out of 5)
Typical eruption style: Explosive
Korovin volcano eruptions: 1829(?), 1844(?), 1907(?), 1951(?), 1953(?), 1973, 1976(?), 1986(?), 1987, 1998, 2005, 2006
Korovin is a 1533 m high stratovolcano in the central Aleutian Islands and one of the most active volcanoes in Alaska. On average, it has been active every 10-15 years, its last eruption being in Nov-Dec 2006 with ash emissions.

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.