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Report on Karymsky (Russia) — 12 November-18 November 2008

Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 12 November-18 November 2008
Managing Editor: Sally Kuhn Sennert

Please cite this report as:

Global Volcanism Program, 2008. Report on Karymsky (Russia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 12 November-18 November 2008. Smithsonian Institution and US Geological Survey.

Volcano Profile |  Weekly Report (12 November-18 November 2008)


Karymsky

Russia

54.049°N, 159.443°E; summit elev. 1513 m

All times are local (unless otherwise noted)


KVERT reported that seismic activity at Karymsky increased above background levels during 11-12 November. On 10 November, ash plumes were seen on satellite imagery drifting 38 km E and 28 km ENE. During 10-11 November, possible explosions may have generated ash plumes to an altitude of 3.8 km (12,500 ft) a.s.l. Also during 10-11 November, analysis of satellite imagery revealed a thermal anomaly in the crater; clouds prevented observations on the other days. The Level of Concern Color Code remained at Orange.

Based on analysis of satellite imagery, information from the Yelizovo Airport (UHPP), and KEMSD notices, the Tokyo VAAC reported that an ash plume rose to an altitude of 2.7 km (9,000 ft) a.s.l. on 12 November. On 12 and 15 November, eruptions generated plumes that rose to an altitude of 3.4 km (11,000 ft) a.s.l.

Geologic Background. Karymsky, the most active volcano of Kamchatka's eastern volcanic zone, is a symmetrical stratovolcano constructed within a 5-km-wide caldera that formed during the early Holocene. The caldera cuts the south side of the Pleistocene Dvor volcano and is located outside the north margin of the large mid-Pleistocene Polovinka caldera, which contains the smaller Akademia Nauk and Odnoboky calderas. Most seismicity preceding Karymsky eruptions originated beneath Akademia Nauk caldera, located immediately south. The caldera enclosing Karymsky formed about 7600-7700 radiocarbon years ago; construction of the stratovolcano began about 2000 years later. The latest eruptive period began about 500 years ago, following a 2300-year quiescence. Much of the cone is mantled by lava flows less than 200 years old. Historical eruptions have been vulcanian or vulcanian-strombolian with moderate explosive activity and occasional lava flows from the summit crater.

Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)