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Koryaksky throws out ash 26 December 2008

Posted by admin in activity reports, Kamchatka, Koryaksky, Russia.

Koryaksky volcano with Avacha Bay and Petropavlovsk harbour in the foreground

According to a bulletin from the Kamchatkan Volcano Emergency Response Team (KVERT), at around 23:30 UTC on 24 December Koryaksky volcano in Kamchatka emitted a dense ash plume that extended over 60km north-east of the volcano, and a weaker plume that extended 140km north-east. Visual observations indicate that the origin of the emissions was a vent about 3km above sea level on the north-western flank of the volcano, from which a dark column rose about 200-300m. The volcano also uttered an audible boom. Two earthquakes were registered on 23 December at a depth of 5km below the volcano. The lack of significant seismicity and the limited height of the column suggest fumarolic rather than eruptive behaviour. Highly active subduction arc volcanoes always need careful watching, however, and no signal of activity can be ignored.

Koryaksky, one of those beautiful symmetrical Kamchatkan volcanoes, lies in the south-east of the Kamchatka Peninsula, near Petropavlovsk. Along with neigbouring Avachinsky, it has been designated a Decade Volcano because of its history of explosive eruptions and its proximity to populated areas. Its most recent eruption was in 1957.

Image: Koryaksky volcano with Avacha Bay and Petropavlovsk harbour in the foreground. [source]

Global Volcanism Program: Koryaksky – information about Koryaksky (1000-09=)
KVERT: current volcanic activity – current activity for the Kamchatkan volcanoes (English)
Current activity of Koryaksky volcano – current status of Koryaksky and many images (Russian and English)

The Volcanism Blog