Report on Lewotobi (Indonesia) — November 1991
Bulletin of the Global Volcanism Network, vol. 16, no. 11 (November 1991)
Managing Editor: Lindsay McClelland.
Lewotobi (Indonesia) Continued gas emission
Please cite this report as:
Global Volcanism Program, 1991. Report on Lewotobi (Indonesia) (McClelland, L., ed.). Bulletin of the Global Volcanism Network, 16:11. Smithsonian Institution.
8.542°S, 122.775°E; summit elev. 1703 m
All times are local (unless otherwise noted)
Degassing has continued since October, sometimes punctuated by ash ejection reaching 50-150 m above the crater. The number of degassing earthquakes dropped slightly from 246 during the first week of December to 233 in the second week. One B-type volcanic earthquake was recorded during the two-week period.
Geologic Background. The Lewotobi "husband and wife" twin volcano (also known as Lewetobi) in eastern Flores Island is composed of the Lewotobi Lakilaki and Lewotobi Perempuan stratovolcanoes. Their summits are less than 2 km apart along a NW-SE line. The conical Lakilaki has been frequently active during the 19th and 20th centuries, while the taller and broader Perempuan has erupted only twice in historical time. Small lava domes have grown during the 20th century in both of the crescentic summit craters, which are open to the north. A prominent flank cone, Iliwokar, occurs on the E flank of Perampuan.
Information Contacts: VSI.