Logo link to homepage

Report on Dieng Volcanic Complex (Indonesia) — 18 May-24 May 2011


Dieng Volcanic Complex

Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
18 May-24 May 2011
Managing Editor: Sally Kuhn Sennert

Please cite this report as:

Global Volcanism Program, 2011. Report on Dieng Volcanic Complex (Indonesia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 18 May-24 May 2011. Smithsonian Institution and US Geological Survey.

Weekly Report (18 May-24 May 2011)

Dieng Volcanic Complex

Indonesia

7.2°S, 109.879°E; summit elev. 2565 m

All times are local (unless otherwise noted)


CVGHM reported that during 18-22 May seismicity at Dieng Volcanic Complex increased. On 22 May diffuse white plumes rose 20 m from the Timbang cone; plumes from the cone had not been previously observed. The next day carbon dioxide gas emissions increased. CVGHM raised the Alert Level to 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.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)