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Report on Tangkubanparahu (Indonesia) — January 1986

Scientific Event Alert Network Bulletin, vol. 11, no. 1 (January 1986)
Managing Editor: Lindsay McClelland.

Tangkubanparahu (Indonesia) Decreasing fumarole temperatures

Please cite this report as:

Global Volcanism Program, 1986. Report on Tangkubanparahu (Indonesia). In: McClelland, L (ed.), Scientific Event Alert Network Bulletin, 11:1. Smithsonian Institution. https://doi.org/10.5479/si.GVP.SEAN198601-263090.

Volcano Profile |  Complete Bulletin


Tangkubanparahu

Indonesia

6.77°S, 107.6°E; summit elev. 2084 m

All times are local (unless otherwise noted)


"In November [1985], Tangkubanparahu showed increased activity with strong gas emission, thick white solfataric fume, and increased temperature at Kawah Baru, a small vent on the W side of the summit crater (10:11-12). Temperatures, normally 95-97°C, rose to 141°C on 30 November, increased progressively to 173°C on 3 January, then slowly decreased. At the end of January the temperature was 158°C. Seismic observations Nov-Jan showed no signs of changes. The average number of volcanic earthquakes was 2/day."

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: A. Sudradjat, VSI.