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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
Tue, 20 Jun
Tue, 20 Jun 15:40 UTCM 1.2 / 6.4 km53 km- 18km NW of Morton, Washington
Tue, 20 Jun 06:04 UTCM 1.6 / 14.1 km66 km- 13km ESE of Molalla, Oregon
Mon, 19 Jun
Mon, 19 Jun 23:40 UTCM 1.6 / 1.1 km22 kmExplosion - Oregon
Sun, 18 Jun
Sun, 18 Jun 07:38 UTCM 2.2 / 5.4 km20 km- 12km NNE of Packwood, Washington
Sat, 17 Jun
Sat, 17 Jun 08:30 UTCM 1.9 / 1.9 km54 km- 17km NNW of Morton, 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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