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Report on Ruang (Indonesia) — 25 September-1 October 2002

Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 25 September-1 October 2002
Managing Editor: Gari Mayberry

Please cite this report as:

Global Volcanism Program, 2002. Report on Ruang (Indonesia). In: Mayberry, G (ed.), Weekly Volcanic Activity Report, 25 September-1 October 2002. Smithsonian Institution and US Geological Survey.

Volcano Profile |  Weekly Report (25 September-1 October 2002)



2.3°N, 125.37°E; summit elev. 725 m

All times are local (unless otherwise noted)

VSI reported that following the 25 September Ruang eruption there was no significant volcanic activity; only thin white clouds rose 100 m above the summit. On 30 September VSI decreased the Alert Level at Ruang from 4 to 3 (on a scale of 1-4).

Geologic Background. Ruang volcano, not to be confused with the better known Raung volcano on Java, is the southernmost volcano in the Sangihe Island arc, north of Sulawesi Island. The 4 x 5 km island volcano rises to 725 m across a narrow strait SW of the larger Tagulandang Island. The summit contains a crater partially filled by a lava dome initially emplaced in 1904. Explosive eruptions recorded since 1808 have often been accompanied by lava dome formation and pyroclastic flows that have damaged inhabited areas.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Darwin Volcanic Ash Advisory Centre (VAAC)