Report on Sinabung (Indonesia) — 26 October-1 November 2016
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 26 October-1 November 2016
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2016. Report on Sinabung (Indonesia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 26 October-1 November 2016. Smithsonian Institution and US Geological Survey.
3.17°N, 98.392°E; summit elev. 2460 m
All times are local (unless otherwise noted)
Based on satellite images, wind data, and ground reports from PVMBG, the Darwin VAAC reported that on 26 and 29 October ash plumes from Sinabung rose to an altitude of 4.2 km (14,000 ft) a.s.l. and drifted SSE. During 31 October-1 November ash plumes rose to an altitude of 3.4 km (11,000 ft) a.s.l. and drifted NE.
Geologic Background. Gunung Sinabung is a Pleistocene-to-Holocene stratovolcano with many lava flows on its flanks. The migration of summit vents along a N-S line gives the summit crater complex an elongated form. The youngest crater of this conical andesitic-to-dacitic edifice is at the southern end of the four overlapping summit craters. An unconfirmed eruption was noted in 1881, and solfataric activity was seen at the summit and upper flanks in 1912. No confirmed historical eruptions were recorded prior to explosive eruptions during August-September 2010 that produced ash plumes to 5 km above the summit.