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Westdahl volcano

Stratovolcano? 1654 m / 5,426 ft
United States, Aleutian Islands, 54.52°N / -164.65°W
Current status: normal or dormant (1 out of 5) | Reports
Westdahl volcano books
Typical eruption style: unspecified
Westdahl volcano eruptions: 1992 
TimeMag. / DepthDistanceLocation
Wed, 17 Oct
Wed, 17 Oct 15:45 UTCM 1.0 / 10.2 km9 km- 76km ENE of Akutan, Alaska
Fri, 12 Oct
Fri, 12 Oct 17:16 UTCM 4.7 / 160 km42 km FOX ISLANDS, ALEUTIAN ISLANDS

Background:

Westdahl is a broad, 1654-m-high glacier-covered volcano occupying the SW end of Unimak Island. Two peaks protrude from the summit plateau, and a new crater formed in 1978 cuts the summit icecap. The broad volcano has a somewhat of a shield-like morphology and forms one of the largest volcanoes of the Aleutian Islands. The sharp-topped, conical Pogromni stratovolcano lies 5 km north of Westdahl. Pogromni rises to 2002 m, several hundred meters higher than Westdahl, but is moderately glacially dissected and presumably older. Many satellitic cones of postglacial age are located along a NW-SE line cutting across the summit of Westdahl. Some of the historical eruptions attributed to the eroded Pogromni volcano may have originated instead from Westdahl (Miller et al. 1998). The first historical eruption of Westdahl occurred in 1795. An 8-km-long fissure extending east from the summit of Westdahl produced explosive eruptions and lava flows in 1991.
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Smithsonian / GVP volcano information


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