Report on Karangetang (Indonesia) — 13 February-19 February 2002
Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
13 February-19 February 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, 13 February-19 February 2002. Smithsonian Institution and US Geological Survey.
2.781°N, 125.407°E; summit elev. 1797 m
All times are local (unless otherwise noted)
An explosion at Karangetang on 11 February produced an ash cloud and lava flows. The ash cloud drifted to the WSW, depositing 0.5-1 mm of ash in the villages of Kanawong, Lehi, Mimi, Kinali, and Pehe. Incandescent lava flows traveled as far as 1-1.5 km to the W down the Beha River and E down the Kahetang River. Seismicity decreased at the volcano in comparison to the previous week and a "red reflection" was visible at night reaching 25 m above the volcano. Karangetang remained at Alert Level 2 (on a scale of 1-4).
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.