Active volcanoes / Aktive vulkaner:

Kliuchevskoi, Russland

Foto av Kliuchevskoi, tatt av Jack Lockwood, U.S. Geological Survey.

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.

Monday, November 30th, 2010
Based on information from the Yelizovo Airport (UHPP), the Tokyo VAAC reported that on 25 November an ash plume rose to an altitude of 7.9 km (26,000 ft) a.s.l. and drifted E. Possible eruptions detected in satellite imagery on 27 and 29 November produced plumes that rose to altitudes of 5.8 km and 6.7 km (19,000 and 22,000 ft) a.s.l., respectively, and drifted NE.

Friday, October 29th, 2010

State of Klyuchevskoy on October 23, 2010.
Photo by Yu. Demyanchuk

As well as Merapi and Sheveluch, the Kliuchevskoi-volcano is just as active. Seismicity of the volcano was above
background levels all week. According to visual data, Strombolian activity was observed all week.
Ash plumes rose up to 8-9 km (26,200-29,500 ft) ASL on October 22-25 and 27.

State of Klyuchevskoy on October 17, 2010.
Photo by Yu. Demyanchuk

According to satellite data, two lava flows continues to effuse from the terminal crater down the western and
south-western flanks of the volcano. A big bright thermal anomaly was registered over the volcano all week.
Ash plumes extended > 2300 km (1426 mi) mainly to the east from the volcano all week.

Tuesday, March 29th, 2005

The nearest neighbor of Kliuchevskoi - the Sheveluch volcano - is in the state of high activity.
In the past 24 hours the ash train stretched to a distance of over 200 km from Kliuchevskoi.
Several flows of lava with a temperature of the order of 1,100 deg Celsius have been continually
flowing on the slopes of Kliuchevskoi (its height is 4,822 m). The dramatic difference of
temperatures during the interaction of lava with snow and ice causes high-yield phreatic
explosions (ruptures of the magma material) with release of ashes.
The ejections of volcanic bombs reach the height of 1,000 m.

Friday, March 25th, 2005

As of the 25th of March, the Kamchatka Volcano Eruption Response Team (KVERT) reported
that on 24 March the Concern Color Code at Kliuchevskoi was raised to Red (the highest level)
due to an increase in seismic and volcanic activity. According to visual and video data,
a gas-and-steam plume containing some amounts of ash rose to ~7.5 km (24,600 ft) a.s.l.
on 22 March and rose to ~ 8.5 km (27,800 ft) a.s.l. on 23 March, extending to the NW.
There was ashfall in the town of Kluchi on 23 March.

Fredag, 11.mars 2005

On March 7th it is reported that the ash plume from Eurasia's tallest Klyuchevskoi volcano in
Kamchatka (Russia's Far East) is now stretched for more than 70 kilometers, according to
Volcanology and Seismology Institute of the Far Eastern department of the Russian Academy
of Sciences. Volcanic bombs are hurled to a height of more than 800 meters.
Continuously rolling down the western slope of the volcano is a lava flow with a temperature
of about 1,100 degrees. The extreme difference between temperatures when the lava interacts
with the ice and snow causes the magmatic material to explode heavily and produce lots of ash.
Eruptions from explosions rise as high as eight kilometers.

The cause of the growing intensity of such explosions is the increased volume of lava over the
past two days. In this connection, the lava flow has broadened and is claiming fresh portions
of the Erman glacier it has melted.

There is now a high probability of massive mud flows rushing down the slopes of the volcano,
which usually have a frontage of up to 500 meters and pass east of the village of Klyuchi,
situated 30 kilometers from the volcano's foothills.

Mud streams carrying at high speed stone rocks up to three meters in diameter and tree trunks represent a serious danger for people and equipment. The population has been warned of the possible menace.

At the same time, the Sheveluch volcano is also in eruption.

Friday February 27th, 2004

11.januar 2004. Sheveluch had an eruption at the same time, and Bezymianny few days later..

During 13-20 February seismicity was above background levels at Kliuchevskoi, with
135 earthquakes of M 1.25-1.7 and 1-6 earthquakes up to M 1.85 occurring daily at
depths of 3-6 km beneath the volcano. Gas-and-steam plumes rose to ~1 km above the
volcano. Kliuchevskoi remained at Concern Color Code Orange.

17.november 2003

Klyuchevskoi October 4th, 2003

Intense light and heat 300 meters above the crater of the Klyuchevsky volcano in
Kamchatka has been observed. This light and heat point to a more intense lava stream,
the Kamchatka seismological party said. Powerful ash, gas and vapor eruptions
reaching the heights of up to 1,500 meters were observed. The ash cloud stretched
for over 20 kilometers to the northeast.

Seismological stations in the area of the volcano recorded a large number of surface
earthquakes and an uninterrupted spasmodic volcanic vibration. Experts said the
Klyuchevsky volcano "entered a long eruption phase." Its activity is gradually intensifying.

Presently, the eruption of the volcano does not pose a threat to the population of the
peninsula. However, the ash eruptions and clouds are dangerous for aviation; ash in the
turbines of a plane can lead to mechanical failure and unexpected eruptions make
navigation difficult.
(RIA Novosti correspondent Oksana Guseva)

25.desember 2002

Pictures from Kamchatka-observatory during the first 28 minutes of the eruption

Klyuchevskoy-eruption 1987
Foto: A. Yu Ozerov

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