Report on Dieng Volcanic Complex (Indonesia) — 24 April-30 April 2002
Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
24 April-30 April 2002
Managing Editor: Gari Mayberry
Please cite this report as:
Global Volcanism Program, 2002. Report on Dieng Volcanic Complex (Indonesia). In: Mayberry, G (ed.), Weekly Volcanic Activity Report, 24 April-30 April 2002. Smithsonian Institution and US Geological Survey.
Dieng Volcanic Complex
7.2°S, 109.879°E; summit elev. 2565 m
All times are local (unless otherwise noted)
During 19-24 April, there was an increase in the number of deep and shallow volcanic earthquakes at Dieng in comparison to previous weeks. A small steam cloud rose 20-25 m above Sileri crater and temperatures taken at several crater lakes on the 20th and 21st had not increased. The volcano was at Alert Level 2 (on a scale of 1-4).
Geological Summary. 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 multiple stratovolcanoes and more than 20 small Pleistocene-to-Holocene craters and cones over a 6 x 14 km area. Prahu stratovolcano was truncated by a large Pleistocene caldera, which was subsequently filled by a series of cones, lava domes, and craters, many containing lakes. Lava flows cover much of the plateau, but observed activity has been restricted to minor phreatic eruptions. Gas emissions are a hazard at several craters and have caused fatalities. There are abundant thermal features and high heat flow across the area.