Report on Raung (Indonesia) — 7 August-13 August 2002

Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 7 August-13 August 2002
Managing Editor: Gari Mayberry

Please cite this report as:

Global Volcanism Program, 2002. Report on Raung (Indonesia). In: Mayberry, G (ed.), Weekly Volcanic Activity Report, 7 August-13 August 2002. Smithsonian Institution and US Geological Survey.

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Raung

Indonesia

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

All times are local (unless otherwise noted)


The Darwin VAAC received reports stating that on 12 August at 1720 ash was visible drifting NW of Raung around summit level. The summit was partially obscured by meteorological clouds and no ash was identifiable on satellite imagery.

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.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)