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Report on Bezymianny (Russia) — 15 March-21 March 2017

Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 15 March-21 March 2017
Managing Editor: Sally Kuhn Sennert

Please cite this report as:

Global Volcanism Program, 2017. Report on Bezymianny (Russia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 15 March-21 March 2017. Smithsonian Institution and US Geological Survey.

Volcano Profile |  Weekly Report (15 March-21 March 2017)


Bezymianny

Russia

55.972°N, 160.595°E; summit elev. 2882 m

All times are local (unless otherwise noted)


KVERT reported that lava continued to advance down Bezymianny's NW flank during 10-17 March, and gas-and-steam plumes rose from the crater. A thermal anomaly was visible each day in satellite images. The Aviation Color Code remained at Orange.

Geologic Background. Prior to its noted 1955-56 eruption, Bezymianny had been considered extinct. The modern volcano, much smaller in size than its massive neighbors Kamen and Kliuchevskoi, was formed about 4700 years ago over a late-Pleistocene lava-dome complex and an ancestral edifice built about 11,000-7000 years ago. Three periods of intensified activity have occurred during the past 3000 years. The latest period, which was preceded by a 1000-year quiescence, began with the dramatic 1955-56 eruption. This eruption, similar to that of St. Helens in 1980, produced a large horseshoe-shaped 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.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)