Report on Dieng Volcanic Complex (Indonesia) — 18 January-24 January 2023
Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 18 January-24 January 2023
Managing Editor: Sally Sennert.
Please cite this report as:
Global Volcanism Program, 2023. Report on Dieng Volcanic Complex (Indonesia) (Sennert, S, ed.). Weekly Volcanic Activity Report, 18 January-24 January 2023. 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)
PVMBG reported that white gas plumes of varying densities rose as high as 80 m above the summit of the Dieng Volcanic Complex during 18-24 January. Carbon dioxide emission averages decreased from an average of 3,300 parts per million during 18-19 January to an average of 1,900 parts per million during 22-23 January. The Alert Level remained at 2 (on a scale of 1-4) and the public was warned to stay 1 km away from Sileri Crater and 500 m away from the SE, S, and SW sectors of Timbang Crater.
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.