Report on Sangeang Api (Indonesia) — 4 September-10 September 2019
Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 4 September-10 September 2019
Managing Editor: Sally Sennert.
Please cite this report as:
Global Volcanism Program, 2019. Report on Sangeang Api (Indonesia) (Sennert, S, ed.). Weekly Volcanic Activity Report, 4 September-10 September 2019. Smithsonian Institution and US Geological Survey.
8.2°S, 119.07°E; summit elev. 1912 m
All times are local (unless otherwise noted)
The Darwin VAAC reported that during 5-7 September intermittent diffuse ash plumes from Sangeang Api were identified in satellite images rising to 3 km (10,000 ft) a.s.l. and drifting S and SW. The Alert Level remained at 2 (on a scale of 1-4).
Geological Summary. 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 eruptions have been recorded since 1512, most of them during in the 20th century.