Report on Tangkubanparahu (Indonesia) — 6 April-12 April 2005
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 6 April-12 April 2005
Managing Editor: Gari Mayberry
Please cite this report as:
Global Volcanism Program, 2005. Report on Tangkubanparahu (Indonesia). In: Mayberry, G (ed.), Weekly Volcanic Activity Report, 6 April-12 April 2005. Smithsonian Institution and US Geological Survey.
6.77°S, 107.6°E; summit elev. 2084 m
All times are local (unless otherwise noted)
On 13 April at 0700 DVGHM raised the Alert Level at Tangkubanparahu to 2 (on a scale of 1-4) due to an increase in seismicity at the volcano. In addition to an increase in seismicity in comparison to the previous day, there was a strong scent of sulfur near Ratu crater. On the 13th at 1300 the Alert Level was raised to 3 due to a further increase in seismicity and the occurrence of tremor. No ash plume was observed. Visitors were banned from the summit and crater area.
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.