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Lava bursts from a crator on the Tolbachik volcano in central Kamchatka, Russia. The massive eruption of Tolbachik began with little warning on Nov. 27, 2012, after 36 years of quiescence. Within two days of the eruption onset, the lava flows had already traveled nearly 10 km, covering an area of ~14 km2.
Image credit: Pavel Izbekov, Geophysical Institute, University of Alaska Fairbanks
