Report on Raung (Indonesia) — July 2002

Bulletin of the Global Volcanism Network, vol. 27, no. 7 (July 2002)
Managing Editor: Richard Wunderman

Raung (Indonesia) Ash plumes to 4.6 km altitude reported in early June 2002

Please cite this report as:

Global Volcanism Program, 2002. Report on Raung (Indonesia). In: Wunderman, R (ed.), Bulletin of the Global Volcanism Network, 27:7. Smithsonian Institution. http://dx.doi.org/10.5479/si.GVP.BGVN200207-263340.

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Raung

Indonesia

8.119°S, 114.056°E; summit elev. 3260 m

All times are local (unless otherwise noted)


On 2 June 2002 at 1625, a pilot reported observing an ash plume emitted from Raung. The plume rose to a height of ~4.5 km altitude and drifted to the S. According to the Darwin VAAC, ash clouds were visible on satellite imagery a few days later. The clouds were at heights below 4.6 km altitude and were observed on 5 June at 0840 drifting S, on 7 June at 0934 drifting SW, and on 8 June at 1132 drifting NW.

According to the Volcanological Survey of Indonesia (VSI), Raung has been erupting for at least a decade, and recent eruptions are events within a single, broader eruptive period. Thus, the above-noted ash eruptions from June were noteworthy outbursts within a longer sustained eruption.

Geologic Background. Raung, one of Java's most active volcanoes, is a massive stratovolcano in easternmost Java that was constructed SW of the rim of Ijen caldera. The unvegetated summit is truncated by a dramatic steep-walled, 2-km-wide caldera that has been the site of frequent historical eruptions. A prehistoric collapse of Gunung Gadung on the W flank produced a large debris avalanche that traveled 79 km, reaching nearly to the Indian Ocean. Raung contains several centers constructed along a NE-SW line, with Gunung Suket and Gunung Gadung stratovolcanoes being located to the NE and W, respectively.

Information Contacts: Darwin Volcanic Ash Advisory Center (VAAC), Bureau of Meteorology, Northern Territory Regional Office, PO Box 40050, Casuarina, NT 0811, Australia (URL: http://www.bom.gov.au/info/vaac/, Email: darwin.vaac@bom.gov.au); Nia Haerani, Volcanological Survey of Indonesia (VSI), Jalan Diponegoro No. 57, Bandung 40122, Indonesia (Email: haerani@vsi.esdm.go.id, URL: http://www.vsi.esdm.go.id/).