Report on Lokon-Empung (Indonesia) — May 1986
Scientific Event Alert Network Bulletin, vol. 11, no. 5 (May 1986)
Managing Editor: Lindsay McClelland.
Lokon-Empung (Indonesia) Small explosion is only activity since April
Please cite this report as:
Global Volcanism Program, 1986. Report on Lokon-Empung (Indonesia) (McClelland, L., ed.). Scientific Event Alert Network Bulletin, 11:5. Smithsonian Institution. https://doi.org/10.5479/si.GVP.SEAN198605-266100
1.358°N, 124.792°E; summit elev. 1580 m
All times are local (unless otherwise noted)
A small explosion 2 June at 0730 ejected a gray plume to ~700 m above the crater. No other activity had been reported since a phreatic explosion on 27 April.
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: A. Sudradjat, L. Pardyanto, and T. Casadevall, VSI.