Report on Sinabung (Indonesia) — 12 February-18 February 2014
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 12 February-18 February 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 February-18 February 2014. 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 webcam images, Indonesian Met office notices, wind data, and ground reports, the Darwin VAAC reported that during 12-13 and 15-18 February ash plumes from Sinabung rose to an altitude of 3.7 km (12,000 ft) a.s.l. and drifted 25-95 km N, NE, and E. On 16 February BNPB reported that villagers outside of the 5-km evacuation zone around Sinabung continued to return to their homes.
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.