Report on Zhupanovsky (Russia) — 28 January-3 February 2015
Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
28 January-3 February 2015
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2015. Report on Zhupanovsky (Russia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 28 January-3 February 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 23-30 January. Satellite images detected ash plumes drifting 160 km SW and SE at altitudes of 5-6 km (16,400-19,700 ft) a.s.l. during 22 and 25-26 January, and a thermal anomaly over the volcano during 23 and 25-27 January. 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.