Report on Sinabung (Indonesia) — 18 February-24 February 2015

Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 18 February-24 February 2015
Managing Editor: Sally Kuhn Sennert

Please cite this report as:

Global Volcanism Program, 2015. Report on Sinabung (Indonesia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 18 February-24 February 2015. Smithsonian Institution and US Geological Survey.

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Sinabung

Indonesia

3.17°N, 98.392°E; summit elev. 2460 m

All times are local (unless otherwise noted)


Based on satellite images and weather models, the Darwin VAAC reported that on 20 February an eruption from Sinabung generated ash plumes that rose to an altitude of 13.7 km (45,000 ft) a.s.l., drifted almost 540 km NW, and became detached. A lower-level eruption later that day produced an ash plume that rose to an altitude of 7.3 km (24,000 ft) a.s.l.

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.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)