Klyuchevskoy volcano (Kamchatka): phase of strong explosive activity generates large ash plume

Sa, 7. Dez 2013, 16:50
16:50 PM | VON: T
Strong ash emissions from Klyuchevskoy last evening (morning in Kamchatka)
Strong ash emissions from Klyuchevskoy last evening (morning in Kamchatka)
A phase of strong explosive activity occurred last evening (this morning Kamchatka time), generating a dense ash plume that rose to approx. 20,000 ft (6 km) altitude and drifted 400 km to the east. This is the strongest activity since 20 November this year, when a powerful paroxysmal phase with lava fountains, lava flows and strong ash emissions ended. During today, the volcano seems to have calmed down again.
The following video shows the activity as time-lapse from KVERT's webcam:

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Sa, 30. Nov 2013, 08:07
Klyuchevskoy volcano this morning (KVERT webcam)
Activity has generally decreased over the past days. VAAC Tokyo reported a possible eruption early today, producing a small ash plume rising to 17,000 ft (5.1 km), i.e. a few hundred meters tall. Webcam images at that time are cloudy, but otherwise show the volcano is mostly quiet. ... Read all
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NASA photo of the eruption of Klyuchevsky volcano on 30 September, 1994, the volcano's largest explosion in 40 years. The large
NASA photo of the eruption of Klyuchevsky volcano on 30 September, 1994, the volcano's largest explosion in 40 years. The large

Background:

Kliuchevskoi is Kamchatka's highest and most active volcano.  Since its origin about 6000 years ago, the beautifully symmetrical, 4835-m-high basaltic stratovolcano has produced frequent moderate-volume explosive and effusive eruptions without major periods of inactivity.  Kliuchevskoi rises above a saddle NE of sharp-peaked Kamen volcano and lies SE of the broad Ushkovsky massif.  More than 100 flank eruptions have occurred at Kliuchevskoi during the past roughly 3000 years, with most lateral craters and cones occurring along radial fissures between the unconfined NE-to-SE flanks of the conical volcano between 500 m and 3600 m elevation.  The morphology of its 700-m-wide summit crater has been frequently modified by historical eruptions, which have been recorded since the late-17th century.  Historical eruptions have originated primarily from the summit crater, but have also included numerous major explosive and effusive eruptions from flank craters.


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Source: Klyuchevsky information by the GVP (Smithsonian Institution)



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