Report on Karymsky (Russia) — October 1996
Bulletin of the Global Volcanism Network, vol. 21, no. 10 (October 1996)
Managing Editor: Richard Wunderman.
Karymsky (Russia) Elevated seismicity in October-November indicates continued eruption
Please cite this report as:
Global Volcanism Program, 1996. Report on Karymsky (Russia) (Wunderman, R., ed.). Bulletin of the Global Volcanism Network, 21:10. Smithsonian Institution. https://doi.org/10.5479/si.GVP.BGVN199610-300130
54.049°N, 159.443°E; summit elev. 1513 m
All times are local (unless otherwise noted)
During the second half of October and November, seismicity remained above background and was indicative of continued low-level Strombolian eruptive activity. On the afternoon of 13 November, a pilot report indicated vigorous but low-level activity; satellite imagery also showed a well-developed plume traveling ~140 km SE. On 15 November AVO analysis of satellite imagery confirmed a hot spot at the volcano and a plume extending 140 km E.
Geological Summary. 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.
Information Contacts: Tom Miller, Alaska Volcano Observatory; Vladimir Kirianov, Kamchatka Volcanic Eruptions Response Team (KVERT), Institute of Volcanic Geology and Geochemistry.