Report on Lewotobi (Indonesia) — 11 June-17 June 2003
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 11 June-17 June 2003
Managing Editor: Gari Mayberry
Please cite this report as:
Global Volcanism Program, 2003. Report on Lewotobi (Indonesia). In: Mayberry, G (ed.), Weekly Volcanic Activity Report, 11 June-17 June 2003. Smithsonian Institution and US Geological Survey.
8.542°S, 122.775°E; summit elev. 1703 m
All times are local (unless otherwise noted)
On 30 May at 1650 an ash explosion at Lewotobi Lakilaki, a stratovolcano of Lewotobi, sent an ash column to a height of ~200 m above the summit. Ash fell at the observatory post about 5 km from the crater. As of 1 June, Lewotobi was at Alert Level 2 (on a scale of 1-4).
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.