Report on Lokon-Empung (Indonesia) — October 1986
Scientific Event Alert Network Bulletin, vol. 11, no. 10 (October 1986)
Managing Editor: Lindsay McClelland.
Lokon-Empung (Indonesia) Periodic explosions; no additional juvenile tephra
Please cite this report as:
Global Volcanism Program, 1986. Report on Lokon-Empung (Indonesia) (McClelland, L., ed.). Scientific Event Alert Network Bulletin, 11:10. Smithsonian Institution. https://doi.org/10.5479/si.GVP.SEAN198610-266100
1.358°N, 124.792°E; summit elev. 1580 m
All times are local (unless otherwise noted)
Phreatic explosions continued through October. No lava flow has been observed. No juvenile material has been reported since breadcrust bombs were ejected in early September.
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: Suratman and T. Casadevall, VSI.