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Kiska volcano

Stratovolcano 1220 m / 4,003 ft
United States, Aleutian Islands, 52.1°N / 177.6°E
Current status: dormant (1 out of 5)
Kiska volcano books
Typical eruption style: unspecified
Kiska volcano eruptions: 1990  No recent earthquakes
TimeMag. / DepthDistanceLocation

Background:

Conical Kiska volcano is the westernmost historically active volcano of the 2500-km-long Aleutian arc. The volcano lies at the northern tip of the elongated Kiska Island, across a low isthmus containing East Kiska and West Kiska lakes. A 400-m-wide elliptical crater, breached to the north, caps the 1220-m-high stratovolcano. The volcano is surrounded on three sides by sea cliffs up to 450 m high and overlies an older volcanic center exposed to the south. A massive submarine debris-avalanche deposit extends 40 km to the NNW. The southern part of the NE-SW-trending island, the westernmost of the Rat Island group, has been glaciated, but all lava flows on Kiska volcano post-date the last major glaciation. Young, steep-sided blocky lava flows, primarily on the northern and SW flanks, have originated from vents at locations ranging from the summit to near sea level. A flank cinder cone and associated lava flows were erupted in 1962 at Sirius Point on the northern coast. The island contains one of the best harbors in the Aleutian Islands, but is uninhabited.
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Smithsonian / GVP volcano information


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