Report on Zhupanovsky (Russia) — 31 December-6 January 2015
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 31 December-6 January 2015
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2014. Report on Zhupanovsky (Russia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 31 December-6 January 2015. Smithsonian Institution and US Geological Survey.
53.589°N, 159.15°E; summit elev. 2899 m
All times are local (unless otherwise noted)
KVERT reported that an eruption at Zhupanovsky continued during 27 December-4 January. Local airline pilots observed explosions and ash plumes that rose to altitudes of 6-9 km (19,700-29,500 ft) a.s.l. on 29 December. That same day ash plumes were observed in satellite images drifting 75 km ENE. The Aviation Color Code remained at Orange.
Geologic Background. The Zhupanovsky volcanic massif consists of four overlapping stratovolcanoes along a WNW-trending ridge. The elongated volcanic complex was constructed within a Pliocene-early Pleistocene caldera whose rim is exposed only on the eastern side. Three of the stratovolcanoes were built during the Pleistocene, the fourth is Holocene in age and was the source of all of Zhupanovsky's historical eruptions. An early Holocene stage of frequent moderate and weak eruptions from 7000 to 5000 years before present (BP) was succeeded by a period of infrequent larger eruptions that produced pyroclastic flows. The last major eruption took place about 800-900 years BP. Historical eruptions have consisted of relatively minor explosions from the third cone.