Klyuchevskoy volcano (Kamchatka): latest flank eruption ended

Do, 25. Mär 2021, 08:43
08:43 AM | VON: MARTIN
Spattering from the cinder cone on the NW flank of Klyuchevskoy volcano on 16 March (image: volkstat.ru)
Spattering from the cinder cone on the NW flank of Klyuchevskoy volcano on 16 March (image: volkstat.ru)
The phase of the effusive-explosive activity of the volcano ceased as reported volcanological observatory KVERT in their latest issue.
The flank-to-lateral eruption on the northwestern slope began to ceased gradually over the past few days although weak incandescence from the cone and flows were still visible in the webcam images.
The eruption started on 21 February and was characterized by formation the new scoria cone (also called a cinder cone) around the NW fissure vents accompanied by the lava flow that currently reflected cooling.
The Aviation Color Code was lowered to Yellow (the second lowest level on a four-color scale) on 22 March. Two days later, on 24 March, the Aviation Color Code was lowered to Green (the lowest level).
Source: Kamchatka Volcanic Eruption Response Team volcano activity update 25 March 2021

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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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