Report on Soputan (Indonesia) — May 1991
Bulletin of the Global Volcanism Network, vol. 16, no. 5 (May 1991)
Managing Editor: Lindsay McClelland.
Soputan (Indonesia) Explosion sounds and incandescence; frequent seismicity
Please cite this report as:
Global Volcanism Program, 1991. Report on Soputan (Indonesia). In: McClelland, L. (ed.), Bulletin of the Global Volcanism Network, 16:5. Smithsonian Institution. https://doi.org/10.5479/si.GVP.BGVN199105-266030.
1.112°N, 124.737°E; summit elev. 1785 m
All times are local (unless otherwise noted)
On 22-24 May... loud booming sounds and night glow were reported from the main crater. Up to 100 seismic events were recorded/6-hour period on 28 May.
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 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: W. Modjo, VSI.