Report on Sangeang Api (Indonesia) — March 1986
Scientific Event Alert Network Bulletin, vol. 11, no. 3 (March 1986)
Managing Editor: Lindsay McClelland.
Sangeang Api (Indonesia) Small explosions increase slightly
Please cite this report as:
Global Volcanism Program, 1986. Report on Sangeang Api (Indonesia). In: McClelland, L. (ed.), Scientific Event Alert Network Bulletin, 11:3. Smithsonian Institution. https://doi.org/10.5479/si.GVP.SEAN198603-264050.
8.2°S, 119.07°E; summit elev. 1949 m
All times are local (unless otherwise noted)
". . . By comparison with activity in December and January, the frequency of small explosions increased slightly during February and March to ~80/day [but see 11:1]. The height of the eruption clouds averaged ~900 m. Since December 1985, no visits have been made to examine the 1985 lava flow, but continued lava production is suspected."
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, A. Sudradjat, and T. Casadevall, VSI.