Report on Sangeang Api (Indonesia) — April 1986
Scientific Event Alert Network Bulletin, vol. 11, no. 4 (April 1986)
Managing Editor: Lindsay McClelland.
Sangeang Api (Indonesia) Continued small explosions; glow
Please cite this report as:
Global Volcanism Program, 1986. Report on Sangeang Api (Indonesia). In: McClelland, L. (ed.), Scientific Event Alert Network Bulletin, 11:4. Smithsonian Institution. https://doi.org/10.5479/si.GVP.SEAN198604-264050.
8.2°S, 119.07°E; summit elev. 1949 m
All times are local (unless otherwise noted)
". . . Activity consisted of small explosions with eruption clouds reaching <1 km above the crater. Persistent glow has been observed above the summit crater during the night, suggesting the presence of lava within the crater and in the 1985 lava channel which drains W from the crater."
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: Olas, Suratman, Suparto, Kaswanda, and A. Sudradjat, VSI.