Klyuchevskoy volcano (Kamchatka) activity update: phreatic explosions

Wed, 29 Apr 2020, 08:54
08:54 AM | BY: MARTIN
Strombolian explosions associated with emissions from Klyuchevskoy volcano on 27 April (image: KVERT)
Strombolian explosions associated with emissions from Klyuchevskoy volcano on 27 April (image: KVERT)
The explosive-effusive eruption of the volcano continues at moderate intensity. Strombolian and sometimes Vulcanian explosions are being observed.
The lava flow continues to be active on the southeastern flank of the volcano (the Apakhonchich chute). Interaction with snow and ice causes phreatic explosions at the contact with lava. Avalanches of loose lava blocks accompany this process.
According to satellite data, a gas-steam plume containing some amount of ash is extending about 54 km to the west of the volcano. Explosions are being observed at the summit crater that reached 20,000 ft (6,096 m) altitude.
Source: Kamchatka Volcanic Eruption Response Team volcano activity update 29 April 2020

Previous news

Wed, 29 Apr 2020, 06:00
KVERT reported that Strombolian and Vulcanian activity at Klyuchevskoy was visible during 24 April-1 May along with a bright thermal anomaly identified in satellite images. Ash plumes drifted about 425 km W, and a lava flow continued to descend the Apakhonchich drainage on the SE flank. The Aviation Color Code remained at Orange. ... 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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