Report on Batu Tara (Indonesia) — 20 March-26 March 2013
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 20 March-26 March 2013
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2013. Report on Batu Tara (Indonesia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 20 March-26 March 2013. Smithsonian Institution and US Geological Survey.
7.791°S, 123.585°E; summit elev. 633 m
All times are local (unless otherwise noted)
Based on analyses of satellite imagery and wind data, the Darwin Volcanic Ash Advisory Centre (VAAC) reported that on 20 March ash plumes from Batu Tara drifted 110 km NW. During 21-26 March ash plumes rose to altitudes of 2.1-3 km (7,000-10,000 ft) a.s.l. and drifted 35-95 km SW, W, N, NW, and NE.
Geologic Background. The small isolated island of Batu Tara in the Flores Sea about 50 km N of Lembata (fomerly Lomblen) Island contains a scarp on the eastern side similar to the Sciara del Fuoco of Italy's Stromboli volcano. Vegetation covers the flanks to within 50 m of the summit. Batu Tara lies north of the main volcanic arc and is noted for its potassic leucite-bearing basanitic and tephritic rocks. The first historical eruption, during 1847-52, produced explosions and a lava flow.