Report on Sangeang Api (Indonesia) — December 1986
Scientific Event Alert Network Bulletin, vol. 11, no. 12 (December 1986)
Managing Editor: Lindsay McClelland.
Sangeang Api (Indonesia) Small explosions but no seismicity
Please cite this report as:
Global Volcanism Program, 1986. Report on Sangeang Api (Indonesia) (McClelland, L., ed.). Scientific Event Alert Network Bulletin, 11:12. Smithsonian Institution.
8.2°S, 119.07°E; summit elev. 1912 m
All times are local (unless otherwise noted)
Explosions continued from Doro Api Crater, ranging from 40 to 70/day from December through the first week in January. Maximum plume height was 800 m. No volcanic earthquakes were recorded.
Geologic Background. Sangeang Api volcano, one of the most active in the Lesser Sunda Islands, forms a small 13-km-wide island off the NE coast of Sumbawa Island. Two large trachybasaltic-to-tranchyandesitic volcanic cones, Doro Api and Doro Mantoi, were constructed in the center and on the eastern rim, respectively, of an older, largely obscured caldera. Flank vents occur on the south side of Doro Mantoi and near the northern coast. Intermittent historical eruptions have been recorded since 1512, most of them during in the 20th century.
Information Contacts: VSI.