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Report on Lokon-Empung (Indonesia) — November 1996


Lokon-Empung

Bulletin of the Global Volcanism Network, vol. 21, no. 11 (November 1996)
Managing Editor: Richard Wunderman.

Lokon-Empung (Indonesia) Low-level activity and shallow earthquakes

Please cite this report as:

Global Volcanism Program, 1996. Report on Lokon-Empung (Indonesia) (Wunderman, R., ed.). Bulletin of the Global Volcanism Network, 21:11. Smithsonian Institution. https://doi.org/10.5479/si.GVP.BGVN199611-266100



Lokon-Empung

Indonesia

1.358°N, 124.792°E; summit elev. 1580 m

All times are local (unless otherwise noted)


During October, Tampoluan crater emitted white vapor up to 50-75 m high. Occasionally, strong sulfuric gases were smelled at the observatory an undisclosed distance away. Volcanic earthquakes tended to increase but activity remained at a low level.

Geological Summary. The Lokong-Empung volcanic complex, rising above the plain of Tondano in North Sulawesi, includes four peaks and an active crater. Lokon, the highest peak, has a flat craterless top. The morphologically younger Empung cone 2 km NE has a 400-m-wide, 150-m-deep crater that erupted last in the 18th century. A ridge extending 3 km WNW from Lokon includes the Tatawiran and Tetempangan peaks. All eruptions since 1829 have originated from Tompaluan, a 150 x 250 m crater in the saddle between Lokon and Empung. These eruptions have primarily produced small-to-moderate ash plumes that sometimes damaged croplands and houses, but lava-dome growth and pyroclastic flows have also occurred.

Information Contacts: Wimpy S. Tjetjep, Volcanological Survey of Indonesia, Jalan Diponegoro No. 57, Bandung 40122, Indonesia.