Report on Sangeang Api (Indonesia) — 12 June-18 June 2019
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 12 June-18 June 2019
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2019. Report on Sangeang Api (Indonesia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 12 June-18 June 2019. Smithsonian Institution and US Geological Survey.
8.2°S, 119.07°E; summit elev. 1949 m
All times are local (unless otherwise noted)
The Darwin VAAC reported that on 17 June multiple discrete emissions with increasing ash content over a period of about an hour rose from Sangeang Api to altitudes of 1.2-2.1 (4,000-7,000 ft) a.s.l. and drifted W and WNW, based on satellite images and weather models. A thermal anomaly was also visible. The Alert Level remained at 2 (on a scale of 1-4).
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.