Report on Lokon-Empung (Indonesia) — 24 August-30 August 2011
Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
24 August-30 August 2011
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2011. Report on Lokon-Empung (Indonesia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 24 August-30 August 2011. Smithsonian Institution and US Geological Survey.
1.358°N, 124.792°E; summit elev. 1580 m
All times are local (unless otherwise noted)
According to a news article, activity from Tompaluan crater, in the saddle between the Lokon-Empung peaks, decreased on 29 August after erupting several times the previous week and specifically 12 times on 28 August. One explosion on 29 August ejected material 250 m above the crater. The article also noted that 222 people remained at temporary refugee camps because their homes were located within 3 kilometers of the crater.
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.
Source: BNO News