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). In: McClelland, L (ed.), Bulletin of the Global Volcanism Network, 16:10. Smithsonian Institution. http://dx.doi.org/10.5479/si.GVP.BGVN199110-263340.

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Raung

Indonesia

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.