Report on Kharimkotan (Russia) — 13 January-19 January 2010
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 13 January-19 January 2010
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2010. Report on Kharimkotan (Russia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 13 January-19 January 2010. Smithsonian Institution and US Geological Survey.
49.12°N, 154.508°E; summit elev. 1145 m
All times are local (unless otherwise noted)
SVERT reported that a thermal anomaly from Kharimkotan's Severgin cone was detected by satellite on 15 January.
Geologic Background. The 8 x 12 km island of Kharimkotan (also spelled Harimkotan) in the northern Kuriles consists of a stratovolcano cut by two breached depressions on the east and NW sides. These horseshoe-shaped craters were formed by slope failure, which produced debris-avalanche deposits that form large broad peninsulas on the east and NW coasts. Evidence of additional slope failures followed by plinian eruptions are found in sea cliffs of the island. Historical explosive eruptions have occurred since the early 18th century. A central cone, Severgin, was largely destroyed during the 1933 eruption, one of the largest in the Kuril Islands during historical time. Impact of a debris avalanche into the sea from the collapse of Severgin produced a tsunami that swept the island's coast and reached Onekotan and Paramushir Islands, killing two people. A large lava dome emplaced during the 1933 eruption now fills the head of the eastern crater.