Report on Zhupanovsky (Russia) — 5 August-11 August 2015
Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
5 August-11 August 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, 5 August-11 August 2015. Smithsonian Institution and US Geological Survey.
53.589°N, 159.15°E; summit elev. 2899 m
All times are local (unless otherwise noted)
On 7 August KVERT reported that explosive activity at Zhupanovsky had finished but collapses of the S part of the active crater continued. On 6 August ash plumes rose to an altitude of 5 km (16,400 ft) a.s.l. and drifted 25-60 km SW. The Aviation Color Code was raised to Yellow.
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.