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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: normal or dormant (1 out of 5) | Reports
West Crater volcano books
Typical eruption style: Explosive
West Crater volcano eruptions: ca. 8000 years ago
TimeMag. / DepthDistanceLocation
Mon, 18 Mar 2019
Mon, 18 Mar 06:01 UTCM 0.8 / 18.7 km44 km11km ENE of Kalama, Washington (USA)
Mon, 18 Mar 05:52 UTCM 1.3 / 3.1 km27 km13km SW of Packwood, Washington (USA)
Mon, 18 Mar 02:28 UTCM 0.9 / 21.2 km40 km15km ENE of Kalama, Washington (USA)
Sun, 17 Mar 2019
Sun, 17 Mar 16:00 UTCM 0.8 / 12.7 km12 km37km SSE of Morton, Washington (USA)
Fri, 15 Mar 2019
Fri, 15 Mar 19:38 UTCM 1.6 / 1.2 km68 kmExplosion - 7km ESE of Molalla, Oregon (USA)
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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