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Archive for the ‘Natural Disaster’ Category

Bezymianny Volcano on Russia’s Kamchatka peninsula erupts

Posted by msrb on August 20, 2008

PETROPAVLOVSK-KAMCHATSKY. The Bezymianny Volcano on Russia’s Kamchatka peninsula has erupted, Itar-Tass reported.

During the period of unrest, it emitted an ash column with a diameter of about 100 km.

The eruption was forecast prior to the unrest. The Bezymianny Volcano (2,800m high) is one of 28 active volcanoes on the peninsula. Bezymianny erupts explosively once or twice each year. The eruptions can last up to several days.

During its most powerful eruption in 1956, Bezymianny dome exploded collapsing about 280m of its summit (reduced from 3080 to 2800m). It ejected about one cubic kilometer volcanic debris in a very short time. [See VEI below.]

Bezymianny Volcano on Russia’s Kamchatka peninsula. Photo: Itar-Tass. Image may be subject to copyright. See Fair Use Notice!

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Volcanic Explosivity Index (VEI)

The Volcanic Explosivity Index (VEI) was devised by Chris Newhall of the U.S. Geological Survey and Steve Self at the University of Hawaiʻi in 1982 to provide a relative measure of the explosiveness of volcanic eruptions.

VEI and ejecta volume correlation. Credit: USGS (Via Wikipedia)

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