Report on Zhupanovsky (Russia) — 25 February-3 March 2015
Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 25 February-3 March 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 February-3 March 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 a moderate explosive eruption at Zhupanovsky continued during 20-27 February. Satellite images detected a thermal anomaly over the volcano during 20-22 and 25-26 February. Ash clouds rose to altitudes of 3-3.5 km (10,000-11,500 ft) a.s.l. and drifted about 250 km E and SE. The Aviation Color Code remained at Orange.
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.