Lewotobi Lakilaki

Lesser Sunda Islands

SUMMARY:

Type: composite
Activity: active
Last Eruption: 1999 AD
Rock Type: ?
Eruptive Volume: ? cu km
Location Map from Xerox PARC
Latitude: 8.53 S
Longitude: 122.78 E

GEOLOGIC HISTORY

The Lewotobi 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 Lewotobi Lakilaki has been frequently active during the 19th and 20th centures, while the taller and broader Lewotobi Perempuan has erupted only twice in historical time. Small lava domes have grown during the 20th century in the crescentic summit craters of both volcanoes, which are open to the north. A prominent flank cone, Iliwokar, occurs on the east flank of Lewotobi Perampuan.

Historic Activity:

  • Lewotobi Lakilaki most recently erupted ash in 1971.

Recent Activity:

  • Sudden increase in seismicity during March and April1991 followed by eruptive activity beginning May 11, 1991. Strombolian activity continued through August 1991.
  • New eruptive activity began in March 1999 and continued into July.

Data Sources

  • Global Volcanism Network (V. 16, No. 4 to V. 24, No. 7).

ADDITIONAL INFORMATION

Last Update: 2/29/00