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Report on Karangetang (Indonesia) — 30 October-5 November 2002

Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 30 October-5 November 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, 30 October-5 November 2002. Smithsonian Institution and US Geological Survey.

Volcano Profile |  Weekly Report (30 October-5 November 2002)


Karangetang

Indonesia

2.781°N, 125.407°E; summit elev. 1797 m

All times are local (unless otherwise noted)


During 21-27 October, low-level plumes continued to rise above Karangetang's South and North craters. Weak-to-strong thundering sounds emanated from the volcano frequently. Seismicity was dominated by emission earthquakes and there was an increase in the number of volcanic earthquakes in comparison to the previous week. Karangetang remained at Alert Level 3 (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.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)