Report on Batu Tara (Indonesia) — 30 January-5 February 2008
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 30 January-5 February 2008
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2008. Report on Batu Tara (Indonesia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 30 January-5 February 2008. Smithsonian Institution and US Geological Survey.
7.791°S, 123.585°E; summit elev. 633 m
All times are local (unless otherwise noted)
On 4 February, CVGHM reported that since 9 October 2007, white plumes from Batu Tara were a daily occurrence. On 8 January, gray plumes rose to an altitude of 1.5 km (4,900 ft) a.s.l. and drifted E. On 26 and 30 January, white plumes rose to altitudes of 1.5-1.7 km (4,900-5,600 ft) a.s.l. and also drifted E. The Darwin VAAC reported that eruption plumes were observed from a ship on 31 January, but ash was not identified on satellite imagery. The Alert level remained at 1 (on a scale of 1-4).
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.