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Westdahl volcano

Stratovolcano? 1654 m / 5,426 ft
United States, Aleutian Islands, 54.52°N / -164.65°W
Current status: dormant (1 out of 5)
Westdahl volcano books
Typical eruption style: unspecified
Westdahl volcano eruptions: 1992 
TimeMag. / DepthDistanceLocation
Mon, 15 May
Mon, 15 May 09:20 UTCM 2.2 / 8.4 km6 km- 67km WSW of False Pass, Alaska
Sat, 13 May
Sat, 13 May 02:58 UTCM 2.3 / 7.6 km4 km- Unimak Island region, Alaska
Fri, 12 May
Fri, 12 May 22:53 UTCM 4.8 / 4 km7 km UNIMAK ISLAND REGION, ALASKA

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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