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Bolshoi Semiachik volcano

Stratovolcanoes 1720 m / 5,643 ft
Kamchatka, Russia, 54.32°N / 160.02°E
Current status: dormant (1 out of 5)
Bolshoi Semiachik volcano books
Typical eruption style: unspecified
Bolshoi Semiachik volcano eruptions: 4450 BC (?) No recent earthquakes
TimeMag. / DepthDistanceLocation

Background:

The Bolshoi Semiachik volcanic complex was constructed within a 10-km-wide caldera whose rim is exposed only on the west. The caldera occupies a large 20 x 30 km late-Pleistocene volcano-tectonic depression near the Pacific Coast of eastern Kamchatka. Post-caldera volcanism includes resurgent doming and the construction of numerous stratovolcanoes and lava domes, several of which have been active during the Holocene. Zubchatka (Bolshoi Semiachik), Zapadny Barany, Vostochny Barany, Zentralny Semiachik, Popkov, Plosky, and Burlyashchy volcanoes are the largest of the volcanic complex. The youngest volcanism and intense modern hydrothermal activity, which is among the most vigorous of Kamchatka, is located outside the caldera to the SE.
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Smithsonian / GVP volcano information


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