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Report on Colo (Indonesia) — August 1987


Scientific Event Alert Network Bulletin, vol. 12, no. 8 (August 1987)
Managing Editor: Lindsay McClelland.

Colo (Indonesia) Plume seen on satellite imagery

Please cite this report as:

Global Volcanism Program, 1987. Report on Colo (Indonesia) (McClelland, L., ed.). Scientific Event Alert Network Bulletin, 12:8. Smithsonian Institution. https://doi.org/10.5479/si.GVP.SEAN198708-266010



0.162°S, 121.601°E; summit elev. 404 m

All times are local (unless otherwise noted)

Imagery from the NOAA 10 polar orbiting weather satellite showed a plume that extended S then W ~200 km from Una Una on 14 July at 0708. VSI could not confirm that an eruption had occurred.

Geological Summary. Colo volcano forms the isolated small island of Una Una in the middle of the Gulf of Tomini in northern Sulawesi. The broad, low volcano contains a 2-km-wide caldera with a small central cone. Only three eruptions have been recorded in historical time, but two of those caused widespread damage over much of the island. The last eruption, in 1983, produced pyroclastic flows that swept over most of the island shortly after all residents had been evacuated.

Information Contacts: W. Gould, NOAA/NESDIS; VSI.