Report on Dieng Volcanic Complex (Indonesia) — April 1986
Scientific Event Alert Network Bulletin, vol. 11, no. 4 (April 1986)
Managing Editor: Lindsay McClelland.
Dieng Volcanic Complex (Indonesia) Earthquakes and tremor but no change in thermal activity
Please cite this report as:
Global Volcanism Program, 1986. Report on Dieng Volcanic Complex (Indonesia). In: McClelland, L (ed.), Scientific Event Alert Network Bulletin, 11:4. Smithsonian Institution. https://doi.org/10.5479/si.GVP.SEAN198604-263200.
Dieng Volcanic Complex
7.2°S, 109.879°E; summit elev. 2565 m
All times are local (unless otherwise noted)
"A widely-felt earthquake occurred near Dieng on 13 April at 0747. Tremor was recorded for up to 10 minutes 14-15 April. Additional small earthquakes were recorded in the following two weeks. No changes were noted in thermal activity."
Geologic Background. The Dieng plateau in the highlands of central Java is renowned both for the variety of its volcanic scenery and as a sacred area housing Java's oldest Hindu temples, dating back to the 9th century CE. The Dieng volcanic complex consists of two or more stratovolcanoes and more than 20 small craters and cones of Pleistocene-to-Holocene age over a 6 x 14 km area. Prahu stratovolcano was truncated by a large Pleistocene caldera, which was subsequently filled by a series of dissected to youthful cones, lava domes, and craters, many containing lakes. Lava flows cover much of the plateau, but have not occurred in historical time, when activity has been restricted to minor phreatic eruptions. Toxic gas emissions are a hazard at several craters and have caused fatalities. The abundant thermal features and high heat flow make Dieng a major geothermal prospect.
Information Contacts: Olas, Suratman, Suparto, Kaswanda, and A. Sudradjat, VSI.