Report on Zhupanovsky (Russia) — 16 November-22 November 2016
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 16 November-22 November 2016
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2016. Report on Zhupanovsky (Russia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 16 November-22 November 2016. 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 at 1429 on 20 November a webcam recorded ash plumes from Zhupanovsky rising to altitudes of 6-8 km (19,700-26,200 ft) a.s.l. and drifted 73 km E. The Aviation Color Code was raised from Green to Orange, the second highest level on a 4-color scale. KVERT noted that conditions were quiet after the eruption; on 22 November the Aviation Color Code was lowered to Yellow.
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.