Klyuchevskoy volcano (Kamchatka): continuing mild strombolian activity

Fr, 30. Jan 2015, 12:11
12:11 PM | VON: T
Lava flow or incandescent avalanche on Klyuchevskoy this morning (evening in Kamchatka)
Lava flow or incandescent avalanche on Klyuchevskoy this morning (evening in Kamchatka)
The volcano's activity today consisted of continuing mild to moderate strombolian activity. Probably the lava flow on its upper flank is still active, but seems to have decreased. Frequent incandescent avalanches occurred, accompanied by mild ash emissions.
VAAC Tokyo issued a warning about a possible ash plume rising to 34,000 ft (10 km) altitude at 02:57 UTC, although it stated that no ash was visible on satellite imagery, and no such plume is visible on webcam imagery, only a rather diluted ash plume at much lower altitude.
Time-lapse video of today's activity:

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Mi, 28. Jan 2015, 18:46
Ash cloud rising from the pyroclastic flow on Klyuchevskoy volcano yesterday
The eruption continues and a lava flow is active on the southeastern upper flank. A collapse of lava from the flow and violent snow-lava interaction produced a pyroclastic flow that descended to the base of the steep mountain yesterday afternoon around 17:40 local time. 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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