Report on Sangeang Api (Indonesia) — July 1987
Scientific Event Alert Network Bulletin, vol. 12, no. 7 (July 1987)
Managing Editor: Lindsay McClelland.
Sangeang Api (Indonesia) Activity continues; plumes to 600 m
Please cite this report as:
Global Volcanism Program, 1987. Report on Sangeang Api (Indonesia). In: McClelland, L. (ed.), Scientific Event Alert Network Bulletin, 12:7. Smithsonian Institution. https://doi.org/10.5479/si.GVP.SEAN198707-264050.
8.2°S, 119.07°E; summit elev. 1949 m
All times are local (unless otherwise noted)
Eruptive activity continued during July with ~45 explosions/day producing plumes to 600 m above the crater rim. No earthquakes accompanied the explosions. No VSI geologist has been able to visit the island to inspect the activity since early 1986.
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.