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Report on Karymsky (Russia) — 1 November-7 November 2006

Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 1 November-7 November 2006
Managing Editor: Sally Kuhn Sennert

Please cite this report as:

Global Volcanism Program, 2006. Report on Karymsky (Russia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 1 November-7 November 2006. Smithsonian Institution and US Geological Survey.

Volcano Profile |  Weekly Report (1 November-7 November 2006)


Karymsky

Russia

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

All times are local (unless otherwise noted)


Activity at Karymsky continued during 26-29 October, with 150-550 shallow earthquakes occurring daily. Based on interpretations of seismic data and satellite imagery, ash plumes may have reached altitudes of 2-4.8 km (6,600-15,700 ft) a.s.l. An ash cloud extended 70 km to the NE on 28 October. A thermal anomaly in the crater was detected on 27-28 and 30-31 October and 2 November. Karymsky remained at Concern Color Code Orange.

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.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)