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West Crater volcano

volcanic field 1329 m / 4,360 ft
Washington, USA (mainland exept Alaska), 45.88°N / -122.08°W
Current status: dormant (1 out of 5)
West Crater volcano books
Typical eruption style: Explosive
West Crater volcano eruptions: ca. 8000 years ago
TimeMag. / DepthDistanceLocation
Sat, 16 Dec
Sat, 16 Dec 21:54 UTCM 1.2 / 7.9 km21 km- 4km ENE of Yacolt, Washington
Sat, 16 Dec 12:39 UTCM 0.9 / 20.5 km36 km- 12km SW of Morton, Washington
Sat, 16 Dec 04:52 UTCM 0.5 / 6.7 km7 km- 36km SSE of Morton, Washington
Sat, 16 Dec 01:32 UTCM 1.5 / 22.2 km36 km- 16km NNE of Morton, Washington
Fri, 15 Dec
Fri, 15 Dec 21:31 UTCM 1.3 / 1.1 km17 kmExplosion - 22km NNE of Amboy, Washington
View all recent quakes
West Crater volcano is a small andesitic lava dome with lava flows in southern Washington, belonging to a volcanic field extending from Marble Mountain, north of Swift Reservoir, to south of Trout Creek Hill. The field consists mainly of small basaltic and basaltic andesite cinder cones and small shield volcanoes, oriented along a NW-SE zone SE of Mount St. Helens.
The most recent activity occurred about 8,000 years ago and formed the West Crater lava dome, a small cone at Hackamore Creek, and a phreatic crater at the summit of Bare Mountain.
The older, basaltic Trout Creek Hill shield volcano erupted a lava flow about 340,000 years ago that traveled 20 km SE and temporarily dammed the Columbia River.

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