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Eruption at Bezymianny 17 December 2009

Posted by admin in activity reports, Bezymianny, eruptions, Kamchatka, Russia.
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Bezymianny volcano on the Kamchatka peninsula is reported by KVERT to have erupted at 21:45 UTC on 16 December:

According to seismic data, an explosive eruption of the volcano began at 21: 45 UTC on December 16. Ash explosions > 10.0 km (>32,800 ft)ASL could occur at any time. The activity of the volcano could affect international and low-flying aircraft.

Seismic activity of the volcano began to increase from December 08, but a size of thermal anomaly – from December 16. At 17:07 UTC on December 16, a size of the thermal anomaly was 6 pixels and the temperature was +19.4 with -23 of background. No visual and video data – the volcano obscured by clouds. But possibly ash fall began occur at Kozyrevsk village from 22:25 UTC on December 16

Tokyo VAAC issued an ash advisory at 22:51 UTC reporting ash at FL320 (32,000 feet or 9750 metres). No further information as yet, and as the KVERT bulletin indicates the Bezymianny webcam is currently showing only a blank cloudy sky.

UPDATE. A further ash advisory from Tokyo, issued 23:41 UTC, reports ash up to FL350 (35,000 feet or 10,600 metres).

[Thanks go to Chance Metz.]

Information
Global Volcanism Program: Bezymianny – summary information for Bezymianny (1000-25=)
Bezymianny volcano – information from KVERT
KVERT: information releases – current activity summary for Kamchatka volcanoes
Alaska Volcano Observatory – Activity – includes AVO reports on Kamchatka volcanoes
Kamchatkan Volcanic Eruption Response Team – KVERT information page from the AVO

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Russian and US scientists join forces to study Bezymianny 26 June 2008

Posted by admin in Bezymianny, Kamchatka, natural hazards, Russia, volcano monitoring.
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From Russia comes news that Russian and US volcanologists are to join forces to study Bezymianny, one of the many active volcanoes of the Kamchatka Peninsula. The principal hazard posed by eruptive activity at Bezymianny is to aviation. KVERT, the organization that monitors the Kamchatka volcanoes, summarizes its hazards thus:

Moderate potential hazards are caused by ash plumes, ash falls, pyroclastic flows, hot avalanches and lahars. The volcano constitutes a potential hazard to international and local airlines at Kamchatka because its eruptive clouds can rise to a height of 8-15 km ASL and extend for hundreds of kilometers from the volcano to different directions.

In a project lasting several years, the Russian/US team will be installing modern seismic and other monitoring networks and probing the volcano’s eruptive processes. The project involves scientists from the Russian Institute of Volcanology and Seismology and the University of Alaska-Fairbanks.

Bezymianny was thought to be extinct until a violent eruption in 1955-6 proved otherwise. On 30 March 1956 an explosive eruption notably similar to that of Mount St Helens in 1980 took place: the upper 180m of the volcano was blown apart, leaving a crater 1.5km in width and projecting an eruption cloud to the east to a height of 40km, at an angle of between 30 and 40 degrees to the horizon. Trees were felled by the directed blast for 24km, and mudflows choked the Kamchatka River. Since then there has been lava-dome growth at Bezymianny, with intermittent explosive eruptions once or twice each year. The RIA-Novosti news agency observes that the 1955-6 eruption of Bezymianny had a profound impact on volcano awareness in the USSR (as it then was), and resulted in the establishment of permanent volcano monitoring stations and the institution of a Soviet Day of Volcanology on 30 March each year.*

[* Thanks to AS for her Russian translations.]

Information
Global Volcanism Program: Bezymianny – summary information for Bezymianny (1000-25=)
Bezymianny volcano – information from KVERT

News
Most dangerous volcano of Kamchatka to be studied – Russia-InfoCentre, 26 June 2008
Вулканологи исследуют самый опасный вулкан Камчатки – RIA-Novosti, 24 June 2008 (Russian)*

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