Report on Zhupanovsky (Russia) — 27 August-2 September 2014
Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
27 August-2 September 2014
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2014. Report on Zhupanovsky (Russia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 27 August-2 September 2014. 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 during 22-28 August the moderate explosive eruption continued at Zhupanovsky. On 28 August ash plumes rose to 3.5-4 km (11,500-13,100 ft) a.s.l. and drifted 80 km SW. During 25-27 August satellite data showed a thermal anomaly over the volcano, but clouds prevented observations the other days of the week. The Tokyo VAAC reported that ash plumes rose to 4.3 km (14,000 ft) a.s.l. and drifted SW.
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.