Klyuchevskoy volcano (Kamchatka): lava flow and a beautiful steam ring

Di, 21. Apr 2020, 11:39
11:39 AM | VON: T
The steam ring ("smoke ring") of Klyuchevskoy volcano this morning (image: KVERT webcam)
The steam ring ("smoke ring") of Klyuchevskoy volcano this morning (image: KVERT webcam)
The active lava flow on Klyuchevskoy this evening; strong steaming from Beyzmianny volcano can also be seen on the left (image: KVERT)
The active lava flow on Klyuchevskoy this evening; strong steaming from Beyzmianny volcano can also be seen on the left (image: KVERT)
The eruption of the volcano continues, mainly characterized by effusive activity, i.e. the emission of a lava flow from the summit crater onto the SE flank.
The intensity of the eruption is not particularly great, however; the lava flow is advancing only slowly and has made little progress on the steep slopes of the world's tallest stratovolcano. This suggests a rather modest effusion rate.
Intermittent small to moderate explosions, probably strombolian in type, generate occasional ash plumes that rise a few hundred meters.
As a beautiful greeting to the world, the volcano sent out a large steam ring into the air earlier today - a ring vortex created when a sudden pulse of gas leaves a circular vent:

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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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