Report on Soputan (Indonesia) — November 1996

Bulletin of the Global Volcanism Network, vol. 21, no. 11 (November 1996)
Managing Editor: Richard Wunderman

Soputan (Indonesia) Dome glow, lava flows, and concerns about rapid dome growth

Please cite this report as:

Global Volcanism Program, 1996. Report on Soputan (Indonesia). In: Wunderman, R (ed.), Bulletin of the Global Volcanism Network, 21:11. Smithsonian Institution. http://dx.doi.org/10.5479/si.GVP.BGVN199611-266030.

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Soputan

Indonesia

1.112°N, 124.737°E; summit elev. 1785 m

All times are local (unless otherwise noted)


On 24 September observers saw glow from the lower part of Soputan's lava dome. Lava flows directed to the S and SW reached ~500 m long by 29 September. Tremor of 2-mm amplitude occurred continually around this time. If rapid dome growth continues, lava avalanches could threaten the Teluk Amurang plantation and village, located 5 and 9 km downslope, respectively.

Geologic Background. The Soputan stratovolcano on the southern rim of the Quaternary Tondano caldera on the northern arm of Sulawesi Island is one of Sulawesi's most active volcanoes. The youthful, largely unvegetated volcano rises to 1784 m and is located SW of Riendengan-Sempu, which some workers have included with Soputan and Manimporok (3.5 km ESE) as a volcanic complex. It was constructed at the southern end of a SSW-NNE trending line of vents. During historical time the locus of eruptions has included both the summit crater and Aeseput, a prominent NE-flank vent that formed in 1906 and was the source of intermittent major lava flows until 1924.

Information Contacts: Wimpy S. Tjetjep, Volcanological Survey of Indonesia, Jalan Diponegoro No. 57, Bandung 40122, Indonesia (Email: vsimvo@ibm.net).