Report on Sinabung (Indonesia) — 27 December-2 January 2018

Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 27 December-2 January 2018
Managing Editor: Sally Kuhn Sennert

Please cite this report as:

Global Volcanism Program, 2017. Report on Sinabung (Indonesia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 27 December-2 January 2018. Smithsonian Institution and US Geological Survey.

Volcano Profile |  Weekly Report (27 December-2 January 2018)


Sinabung

Indonesia

3.17°N, 98.392°E; summit elev. 2460 m

All times are local (unless otherwise noted)


PVMBG reported that during 27 December 2017-2 January 2018 events at Sinabung generated ash plumes that rose as high as 3.2 km above the crater rim, and avalanches of material that traveled as far as 1.5 km E, SE, and S. Pyroclastic flows descended the E, SSE, and S flanks during 27-29 December, traveling 4.6 km SSE and 3.5 km E and S.

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.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)