Report on Karangetang (Indonesia) — 9 October-15 October 2002
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 9 October-15 October 2002
Managing Editor: Gari Mayberry
Please cite this report as:
Global Volcanism Program, 2002. Report on Karangetang (Indonesia). In: Mayberry, G (ed.), Weekly Volcanic Activity Report, 9 October-15 October 2002. Smithsonian Institution and US Geological Survey.
2.781°N, 125.407°E; summit elev. 1797 m
All times are local (unless otherwise noted)
Karangetang remained active during 9 September to 6 October, with low-level ash clouds rising above South and North craters, lava flowing from the crater, and volcanic tremor being recorded. The lava flows traveled 25-200 m from the crater rim toward the Nanitu River and as far as 400 m toward Beha River. Karangetang remained at Alert Level 2 (on a scale of 1-4).
Geologic Background. Karangetang (Api Siau) volcano lies at the northern end of the island of Siau, north 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 in the historical record (Catalog of Active Volcanoes of the World: 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 has also produced pyroclastic flows.