OREGON STATE UNIVERSITY
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Lewotobi is a stratovolcano with at least 19 historic eruptions between 1675 and 1991. Most eruptions are from the Lewotobi Lakilaki vent. Only two eruptions have been from the Lewotobi Perempuan vent. Most eruptions are explosive and moderate to moderate large (VEI=2-3) in size. Eruptions in 1869 and 1907 caused a total of three fatalities. Space shuttle photo STS060-0106-0008.
November 4, 2003
The Alert Level was reduced from 2 to 1 as a result of decreased volcanic activity from Oct. 13-19. Only low levels of gas were emitted from Lewotobi.
This information was summarized from the GVP/USGS Weekly Volcanic Activity Report
September 2 2003
On Sept. 1, an eruption produced an ash plume that rose ~2.5 km high. The Alert
Level was raised to a 4 and evacuations took place in areas surrounding the volcano. By the 2nd, the Alert Level was lowered to 3.
This information was summarized from the GVP/USGS Weekly Volcanic Activity Report
June 17, 2003
On May 30, an explosion sent an ash column to a height of ~200 m above the summit. Ash fell on the observatory about 5 km from the crater. As of 1 June, Lewotobi was at Alert Level 2 (on a scale of 1-4).
This information was summarized from the GVP/USGS Weekly Volcanic Activity Report
October 15, 2002
At 23:30 on the evening of October 12, an explosion occurred and a weak thundering sound was heard. The explosion produced an ash column ~500 m high and ash deposits reached up to 5 km from the volcano. More explosions are expected to take place over the next couple of weeks and months. It has been placed under an alert level 4 warning.
This information was summarized from the GVP/USGS Weekly Volcanic Activity Report
July 1, 1999
On 1 July 1999, the Mount Lewotobi Volcano sent up a plume of ash and volcanic debris. No injuries were reported.
This information was summarized from Discovery Online
Sources of Information: Simkin, T., and Siebert, L., 1994, Volcanoes of the World: Geoscience Press, Tucson, Arizona, 349 p.
Neumann van Padang, M., 1951, Indonesia. Catalogue of the Active Volcanoes of the World, International Association of Volcanology, 1, Rome, Italy, 271 p.