Akademia Nauk Volcano, Russia

Akademia Nauk caldera in central Kamchatka, seen here from the slopes of Karymsky volcano looking SW, is one of two overlapping calderas formed during the late Pleistocene within the 15-km-wide Polovinka caldera.

The snow-capped ridge at the upper left is the southern rim of Odnoboky caldera, whose northern rim is truncated by the Akademia Nauk caldera.

Karymsky Lake fills the 3 x 5 km Akademia Nauk caldera, which had its first historical eruption in 1996.

PHOTO SOURCE: Dan Miller 1990, US Geological Survey, courtesy of the Global Volcanism Program, Smithsonian National Museum of Natural History, used with permission.

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