Report on Zhupanovsky (Russia) — 25 November-1 December 2015
Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 25 November-1 December 2015
Managing Editor: Sally Sennert.
Please cite this report as:
Global Volcanism Program, 2015. Report on Zhupanovsky (Russia) (Sennert, S, ed.). Weekly Volcanic Activity Report, 25 November-1 December 2015. Smithsonian Institution and US Geological Survey.
53.589°N, 159.15°E; summit elev. 2899 m
All times are local (unless otherwise noted)
Based on satellite images, KVERT reported that on 28 November ash plumes from Zhupanovsky rose to altitudes of 5-6 km (16,400-19,700 ft) a.s.l. and drifted 285 km E. The Aviation Color Code was raised to Orange. IVS FED RAS (Institute Volcanology and Seismology Far East Division of the Russian Academy of Sciences) observers noted an ash explosion at 0356 on 1 December; the Tokyo VAAC reported that the resulting ash plume rose to an altitude of 9 km (29,500 ft) a.s.l. and drifted 60 km SE.
Geological Summary. The Zhupanovsky volcanic massif consists of four overlapping stratovolcanoes along a WNW-trending ridge. The elongated 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. An early Holocene stage of frequent moderate and weak eruptions from 7,000 to 5,000 years before present (BP) was followed by a period of infrequent larger eruptions that produced pyroclastic flows. The last major eruption took place about 800-900 BP. Recorded eruptions have consisted of relatively minor explosions from Priemysh, the third cone from the E about 2.5 km from the summit peak.