Report on Sangeang Api (Indonesia) — March 1987
Scientific Event Alert Network Bulletin, vol. 12, no. 3 (March 1987)
Managing Editor: Lindsay McClelland.
Sangeang Api (Indonesia) Small gas explosions continue
Please cite this report as:
Global Volcanism Program, 1987. Report on Sangeang Api (Indonesia). In: McClelland, L. (ed.), Scientific Event Alert Network Bulletin, 12:3. Smithsonian Institution. https://doi.org/10.5479/si.GVP.SEAN198703-264050.
8.2°S, 119.07°E; summit elev. 1949 m
All times are local (unless otherwise noted)
March eruptive activity consisted of ~250 small gas explosions with plumes reaching a maximum height of 600 m above the crater rim. Of the 22 earthquakes recorded during March, 17 were of tectonic origin (deep) and five were volcanic (shallow).
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, 1949-m-high Doro Api and 1795-m-high 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; T. Casadevall, USGS & VSI.