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Report on Iliboleng (Indonesia) — June 1991

Bulletin of the Global Volcanism Network, vol. 16, no. 6 (June 1991)
Managing Editor: Lindsay McClelland.

Iliboleng (Indonesia) Vapor and ash emission

Please cite this report as:

Global Volcanism Program, 1991. Report on Iliboleng (Indonesia). In: McClelland, L. (ed.), Bulletin of the Global Volcanism Network, 16:6. Smithsonian Institution. https://doi.org/10.5479/si.GVP.BGVN199106-264220.

Volcano Profile |  Complete Bulletin



8.342°S, 123.258°E; summit elev. 1659 m

All times are local (unless otherwise noted)

Vapor and ash were continuously emitted to 100-850 m height, beginning 8 May and continuing through June. Shallow volcanic earthquakes were recorded 15-25 times/week (figure 2), but no explosion earthquakes were recorded. Tectonic earthquakes averaged 14-24/week.

Figure (see Caption) Figure 2. Monthly number of earthquakes at Iliboleng, January 1990-May 1991. Courtesy of VSI.

Geologic Background. Iliboleng stratovolcano was constructed at the SE end of Adonara Island across a narrow strait from Lomblen Island. The volcano is capped by multiple, partially overlapping summit craters. Lava flows modify its profile, and a cone low on the SE flank, Balile, has also produced lava flows. Historical eruptions, first recorded in 1885, have consisted of moderate explosive activity, with lava flows accompanying only the 1888 eruption.

Information Contacts: W. Modjo, VSI.