Report on Karangetang (Indonesia) — 9 September-15 September 2015
Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 9 September-15 September 2015
Managing Editor: Sally Sennert.
Please cite this report as:
Global Volcanism Program, 2015. Report on Karangetang (Indonesia) (Sennert, S, ed.). Weekly Volcanic Activity Report, 9 September-15 September 2015. Smithsonian Institution and US Geological Survey.
2.781°N, 125.407°E; summit elev. 1797 m
All times are local (unless otherwise noted)
Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that during 10-15 September ash plumes from Karangetang rose to altitudes of 1.8-3 km (6,000-10,000 ft) a.s.l. and drifted 35-130 km SE and NE.
Geological Summary. Karangetang (Api Siau) volcano lies at the northern end of the island of Siau, about 125 km NNE of the NE-most point of Sulawesi. The stratovolcano contains five summit craters along a N-S line. It is one of Indonesia's most active volcanoes, with more than 40 eruptions recorded since 1675 and many additional small eruptions that were not documented (Neumann van Padang, 1951). Twentieth-century eruptions have included frequent explosive activity sometimes accompanied by pyroclastic flows and lahars. Lava dome growth has occurred in the summit craters; collapse of lava flow fronts have produced pyroclastic flows.