Report on Raung (Indonesia) — 5 June-11 June 2002
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 5 June-11 June 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, 5 June-11 June 2002. Smithsonian Institution and US Geological Survey.
8.119°S, 114.056°E; summit elev. 3260 m
All times are local (unless otherwise noted)
The Darwin VAAC reported that possible ash clouds emitted from Raung were visible on satellite imagery. The clouds were at heights below 4.6 a.s.l. and were observed on 5 June at 0840 drifting to the S, on 7 June at 0934 drifting to the SW, and on 8 June at 1132 drifting to the NW.
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.