Report on Dieng Volcanic Complex (Indonesia) — September 2003
Bulletin of the Global Volcanism Network, vol. 28, no. 9 (September 2003)
Managing Editor: Edward Venzke.
Dieng Volcanic Complex (Indonesia) One shallow volcanic earthquake and a gas plume in early August
Please cite this report as:
Global Volcanism Program, 2003. Report on Dieng Volcanic Complex (Indonesia). In: Venzke, E (ed.), Bulletin of the Global Volcanism Network, 28:9. Smithsonian Institution. https://doi.org/10.5479/si.GVP.BGVN200309-263200.
Dieng Volcanic Complex
7.2°S, 109.879°E; summit elev. 2565 m
All times are local (unless otherwise noted)
The Volcanological Survey of Indonesia (VSI) activity report for the week of 4-10 August 2003 noted, for the Sileri crater in the Dieng volcano complex, one shallow volcanic earthquake, a white gas plume rising 25-60 m, and water temperature of 83°C. The hazard status was set at Alert Level 2 (on a scale of 1-4).
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: Dali Ahmad and Nia Haerani, Volcanological Survey of Indonesia (VSI), Jalan Diponegoro No. 57, Bandung 40122, Indonesia (URL: http://www.vsi.esdm.go.id/).