Report on Raung (Indonesia) — October 1991
Bulletin of the Global Volcanism Network, vol. 16, no. 10 (October 1991)
Managing Editor: Lindsay McClelland.
Raung (Indonesia) Continued ash emission
Please cite this report as:
Global Volcanism Program, 1991. Report on Raung (Indonesia) (McClelland, L., ed.). Bulletin of the Global Volcanism Network, 16:10. Smithsonian Institution.
8.119°S, 114.056°E; summit elev. 3260 m
All times are local (unless otherwise noted)
Vigorous ash emissions, rising to 300-600 m, were observed from an aircraft on 3 October.
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: N. MacLeod, Ridgefield WA, USA.