Gas-and-steam plume emissions occurred simultaneously from vents on the SW flank and the summit of Klyuchevskoy volcano in 1983. The SW-flank vent within a 200-m-long fissure produced the dark lava flow that melted the glacier surface, providing a channel for the lava flow and producing lahars that traveled 15 km. The flank eruption began on 8 March and was initially was restricted to a glacier gorge, but then bifurcated, forming a small lava field. Intermittent summit crater explosive activity had been occurring since October 1982.

Photo by Yuri Doubik, 1983 (Institute of Volcanology, Petropavlovsk).

This image is made available under the Creative Commons BY-NC 4.0 license terms.

Galleries: Lava Flows

Keywords: lava flow | steam | gas plume | eruption | lahar

Klyuchevskoy