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Report on Lewotobi (Indonesia) — April 1991


Lewotobi

Bulletin of the Global Volcanism Network, vol. 16, no. 4 (April 1991)
Managing Editor: Lindsay McClelland.

Lewotobi (Indonesia) Brief increase in seismicity

Please cite this report as:

Global Volcanism Program, 1991. Report on Lewotobi (Indonesia) (McClelland, L., ed.). Bulletin of the Global Volcanism Network, 16:4. Smithsonian Institution. https://doi.org/10.5479/si.GVP.BGVN199104-264180



Lewotobi

Indonesia

8.542°S, 122.775°E; summit elev. 1703 m

All times are local (unless otherwise noted)


A sudden increase in seismicity, from 7 to 60 earthquakes/day, was recorded at the end of March. Activity peaked on 26 March, then gradually decreased. No changes in surface activity were observed.

Geological Summary. The Lewotobi edifice in eastern Flores Island is composed of the two adjacent Lewotobi Laki-laki and Lewotobi Perempuan stratovolcanoes (the "husband and wife"). Their summits are less than 2 km apart along a NW-SE line. The conical Laki-laki to the NW has been frequently active during the 19th and 20th centuries, while the taller and broader Perempuan has had observed eruptions in 1921 and 1935. Small lava domes have grown during the 20th century in both of the summit craters, which are open to the north. A prominent cone, Iliwokar, occurs on the E flank of Perampuan.

Information Contacts: W. Modjo, VSI.