Report on Galunggung (Indonesia) — 16 July-22 July 2008
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 16 July-22 July 2008
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2008. Report on Galunggung (Indonesia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 16 July-22 July 2008. Smithsonian Institution and US Geological Survey.
7.25°S, 108.058°E; summit elev. 2168 m
All times are local (unless otherwise noted)
Based on a pilot report and inconclusive observations of satellite imagery, the Darwin VAAC reported that on 17 July a possible ash plume from Galunggung rose to an altitude of 5.5 km (18,000 ft) a.s.l. and drifted SW. CVGHM did not report eruptive activity and advised that the activity status was "normal."
Geologic Background. The forested slopes Galunggung in western Java are cut by a large horseshoe-shaped caldera breached to the SE that has served to channel the products of recent eruptions in that direction. The "Ten Thousand Hills of Tasikmalaya" dotting the plain below the volcano are debris-avalanche hummocks from the collapse that formed the breached caldera about 4200 years ago. Although historical eruptions, restricted to the central vent near the caldera headwall, have been infrequent, they have caused much devastation. The first historical eruption in 1822 produced pyroclastic flows and lahars that killed over 4000 people. More recently, a strong explosive eruption during 1982-1983 caused severe economic disruption to populated areas near the volcano.