Report on Sinabung (Indonesia) — 12 November-18 November 2014
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 12 November-18 November 2014
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2014. Report on Sinabung (Indonesia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 12 November-18 November 2014. Smithsonian Institution and US Geological Survey.
3.17°N, 98.392°E; summit elev. 2460 m
All times are local (unless otherwise noted)
On 14 November BNPB reported that activity at Sinabung remained elevated; avalanches occurred 79 times, and pyroclastic flows generated by three of the avalanches traveled 4 km S. Ash plumes rose 1 km and the lava flow was active 500 m down from the crater on the S and W flanks. The report stated that 2,986 people from 956 households remained displaced. The Darwin VAAC reported that ash plumes drifting W, SW, and S were recorded by a webcam during 12-18 November. Dense white plumes and intermittent pyroclastic flows were visible on 19 November.
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. The youngest deposit is a SE-flank pyroclastic flow 14C dated by Hendrasto et al. (2012) at 740-880 CE. 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.