Report on Mutnovsky (Russia) — 18 June-24 June 2008
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 18 June-24 June 2008
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2008. Report on Mutnovsky (Russia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 18 June-24 June 2008. Smithsonian Institution and US Geological Survey.
52.449°N, 158.196°E; summit elev. 2288 m
All times are local (unless otherwise noted)
KVERT reported that seismic activity in the area of Gorely and Mutnovsky volcanoes decreased during 15-18 June. Moderate fumarolic activity was observed on 17 June; no activity was noted or cloud cover obscured views the other days during 14-20 June. The level of Concern Color Code was lowered to Green on 20 June.
Geologic Background. Massive Mutnovsky, one of the most active volcanoes of southern Kamchatka, is formed of four coalescing stratovolcanoes of predominately basaltic composition. Multiple summit craters cap the volcanic complex. Growth of Mutnovsky IV, the youngest cone, began during the early Holocene. An intracrater cone was constructed along the northern wall of the 1.3-km-wide summit crater. Abundant flank cinder cones were concentrated on the SW side. Holocene activity was characterized by mild-to-moderate phreatic and phreatomagmatic eruptions from the summit crater. Historical eruptions have been explosive, with lava flows produced only during the 1904 eruption. Geothermal development is planned at Mutnovsky, which has the highest heat capacity of any volcano in the Kuril-Kamchatka arc.