Report on Batu Tara (Indonesia) — 21 March-27 March 2007
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 21 March-27 March 2007
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2007. Report on Batu Tara (Indonesia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 21 March-27 March 2007. 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 reports from fishermen and people in coastal communities about 50 km away, CVGHM reported that eruption plumes from Batu Tara rose to altitudes of 1.2-2.2 km (3,900-7,200 ft) a.s.l. and drifted E during 18-19 March. In response, the Alert Level was raised from 1 to 2 (on a scale of 1-4). Based on information from CVGHM and satellite imagery, the Darwin VAAC reported that continuous diffuse plumes rose to 1.5 km (5,000 ft) a.s.l. and drifted mainly SE during 21-27 March.
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.