Report on Tangkubanparahu (Indonesia) — 7 August-13 August 2019
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 7 August-13 August 2019
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2019. Report on Tangkubanparahu (Indonesia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 7 August-13 August 2019. Smithsonian Institution and US Geological Survey.
6.77°S, 107.6°E; summit elev. 2084 m
All times are local (unless otherwise noted)
PVMBG reported that during 5-11 August phreatic events at Tangkubanparahu's Ratu Crater continued to produced sometimes dense, gray-to-white plumes that rose as high as 200 m above the vent and ash plumes rose as high as 100 m. The emissions were accompanied by roaring. Ashfall was localized around Ratu Crater. The seismic network recorded continuous tremor. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay 1.5 km away from the active crater.
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.