Klyuchevskoy volcano news and activity updates
The Kamchatka Volcano Eruption Response Team (KVERT) reported that seismic activity of Klyuchevsky volcano is at background level, but a thermal anomaly is visible on satellite imagery at the summit crater. The team considers the possibility of explosions that produce ash plumes that reach as high as 6 km (or 19,700 ft).
Eruptive and seismic activity at Klyuchevsky volcano, neighbour of Sheveluch (also active at the time of writing) has decreased but remains. According to press reports, strong strombolian explosions from the summit crater eject ash and blocks to up to 1000 m above the crater and lava flows are travelling down the upper flanks, interacting with ice and snow, that produce secondary ash clouds.
It cannot be excluded that stronger explosions from the summit crater occurr with no or little warning; they could produce ash plumes that reach as high as 7-8 km or 23,000-26,200 ft above sea level and travel many tens or hundreds of kilometers downwind.
Klyuchi settlement is situated between Shiveluch and Klyuchevsky and receives periodically light ash fall, but the settlement is still being regarded "safe".
As KVERT (Kamchatkan Volcanic Eruptions Response Team) reports, the eruption at Klyuchevkoy volcano in Kamtchatka has increased dramatically:
"Continuous explosions from the summitcrater could produce ash plumes that reach as high as 10 km or 32,800 ft above sea level and travel many tens or hundreds of kilometers downwind. The current activity of the volcano is very dangerous to aviation. <...>Seismic activity of the volcano has increased. <...> According to visual and video data, agas-steam plume containing some amounts of ash rose up to ~7500 m (24600ft) ASL on March 22 and up to ~ 8500 m (27,800 ft) ASL on March 23, extending to the north-west. There was ash fall at Kluchi from 18:45 till present time on March 23. According to data from AMC Yelizovo, an ash plume rising up to 7,000 m (23, 000 ft.) ASL and extending 70-80 km (44 -50 mi) to the north-west was observed by pilots of aircraft AN-72 N 71602 at 23:05UTC on March 23."
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.
Source: Klyuchevsky information by the GVP (Smithsonian Institution)