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Random pictures

Maly Semiachik volcano

Caldera 1560 m / 5,118 ft
Kamchatka, Russia, 54.13°N / 159.67°E
Current status: normal or dormant (1 out of 5) | Reports
Maly Semiachik volcano books
Typical eruption style: unspecified
Maly Semiachik volcano eruptions: 1952  No recent earthquakes
TimeMag. / DepthDistanceLocation

Background:

Maly Semiachik is a compound stratovolcano located in a 10-km-wide caldera within the 15 x 20 km mid-Pleistocene Stena-Soboliny caldera. Following construction during the late Pleistocene of the Paleo-Semiachik volcano beginning about 20,000 years before present (BP), activity migrated to the SW, forming Meso-Semiachik (about 11,000-9000 BP) and Ceno-Semiachik (about 8000 BP to the present). An initial stage lasting about 3500 years was dominantly explosive, constructing the present cone. A second stage beginning about 4400 years ago was marked by alternating constructive and destructive processes during which the volcano was destroyed by major explosions and then reconstructed. A crater lake fills the historically active Troitsky Crater, which formed during a large explosive eruption about 400 years ago.
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Smithsonian / GVP volcano information

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