Report on Sangeang Api (Indonesia) — April 1987
Scientific Event Alert Network Bulletin, vol. 12, no. 4 (April 1987)
Managing Editor: Lindsay McClelland.
Sangeang Api (Indonesia) About 50 small explosions daily
Please cite this report as:
Global Volcanism Program, 1987. Report on Sangeang Api (Indonesia) (McClelland, L., ed.). Scientific Event Alert Network Bulletin, 12:4. Smithsonian Institution. https://doi.org/10.5479/si.GVP.SEAN198704-264050.
8.2°S, 119.07°E; summit elev. 1912 m
All times are local (unless otherwise noted)
Sangeang Api continued in eruption with an average of ~50 small explosions/day during April. The maximum plume height was 600 m. No earthquakes were detected during April.
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: T. Casadevall, USGS & VSI.