Report on Zhupanovsky (Russia) — 20 January-26 January 2016
Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
20 January-26 January 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, 20 January-26 January 2016. 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 visual observations, KVERT reported that on 21 January explosions at Zhupanovsky generated ash plumes that rose to an altitude of 8 km (26,200 ft) a.s.l. and drifted 36 km W. A thermal anomaly was detected in satellite images. The Aviation Color Code remained at Orange (the second highest on a four-color scale).
Geological Summary. 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.