Report on Tangkubanparahu (Indonesia) — September 2002
Bulletin of the Global Volcanism Network, vol. 27, no. 9 (September 2002)
Managing Editor: Richard Wunderman.
Tangkubanparahu (Indonesia) First elevated seismicity since 1992
Please cite this report as:
Global Volcanism Program, 2002. Report on Tangkubanparahu (Indonesia). In: Wunderman, R (ed.), Bulletin of the Global Volcanism Network, 27:9. Smithsonian Institution. https://doi.org/10.5479/si.GVP.BGVN200209-263090.
6.77°S, 107.6°E; summit elev. 2084 m
All times are local (unless otherwise noted)
The Volcanological Survey of Indonesia (VSI) reported that Tangkubanparahu reactivated during late August 2002. On 2 September the Alert Level was raised to 2, following an elevated number of earthquakes that were registered during the previous two weeks. The temperatures of Domas and Ratu craters increased ~2-4°C; Domas crater was at 74-93°C and Ratu crater at 95-100°C. No visual changes accompanied the temperature increase inside the craters, but several animals were found dead in Ratu crater. Seismicity totals for the week of 26 August-1 September were three deep-volcanic (A-type), 172 shallow-volcanic (B-type), and 12 tectonic earthquakes. During 2-8 September, four A-type, 224 B-type, and two tectonic earthquakes were registered.
Geologic Background. Tangkubanparahu (also known as Tangkuban Perahu) is a broad shield-like stratovolcano overlooking Indonesia's former capital city of Bandung. The volcano was constructed within the 6 x 8 km Pleistocene Sunda caldera, which formed about 190,000 years ago. The volcano's low profile is the subject of legends referring to the mountain of the "upturned boat." The rim of Sunda caldera forms a prominent ridge on the western side; elsewhere the caldera rim is largely buried by deposits of Tangkubanparahu volcano. The dominantly small phreatic historical eruptions recorded since the 19th century have originated from several nested craters within an elliptical 1 x 1.5 km summit depression.
Information Contacts: Volcanological Survey of Indonesia (VSI), Jalan Diponegoro No. 57, Bandung 40122, Indonesia (URL: http://www.vsi.esdm.go.id/).