Report on Bezymianny (Russia) — December 1996
Bulletin of the Global Volcanism Network, vol. 21, no. 12 (December 1996)
Managing Editor: Richard Wunderman.
Bezymianny (Russia) Fumarolic plumes seen
Please cite this report as:
Global Volcanism Program, 1996. Report on Bezymianny (Russia) (Wunderman, R., ed.). Bulletin of the Global Volcanism Network, 21:12. Smithsonian Institution. https://doi.org/10.5479/si.GVP.BGVN199612-300250
55.972°N, 160.595°E; summit elev. 2882 m
All times are local (unless otherwise noted)
On 5-6 and 17 December and on 4, 9, and 14-15 January, fumarolic plumes were observed reaching as high as 100 m above the crater. The plumes extended 10 km downwind.
Geological Summary. The modern Bezymianny, much smaller than its massive neighbors Kamen and Kliuchevskoi on the Kamchatka Peninsula, was formed about 4,700 years ago over a late-Pleistocene lava-dome complex and an ancestral edifice built about 11,000-7,000 years ago. Three periods of intensified activity have occurred during the past 3,000 years. The latest period, which was preceded by a 1,000-year quiescence, began with the dramatic 1955-56 eruption. This eruption, similar to that of St. Helens in 1980, produced a large open crater that was formed by collapse of the summit and an associated lateral blast. Subsequent episodic but ongoing lava-dome growth, accompanied by intermittent explosive activity and pyroclastic flows, has largely filled the 1956 crater.
Information Contacts: Tom Miller, Alaska Volcano Observatory (AVO), a cooperative program of a) U.S. Geological Survey, 4200 University Drive, Anchorage, AK 99508-4667, USA (URL: http://www.avo.alaska.edu/), b) Geophysical Institute, University of Alaska, PO Box 757320, Fairbanks, AK 99775-7320, USA, and c) Alaska Division of Geological & Geophysical Surveys, 794 University Ave., Suite 200, Fairbanks, AK 99709, USA; Vladimir Kirianov, Kamchatka Volcanic Eruptions Response Team (KVERT), Institute of Volcanic Geology and Geochemistry, Piip Ave. 9, Petropavlovsk-Kamchatsky, 683006, Russia.