Report on Inielika (Indonesia) — 10 January-16 January 2001
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 10 January-16 January 2001
Managing Editor: Gari Mayberry
Please cite this report as:
Global Volcanism Program, 2001. Report on Inielika (Indonesia). In: Mayberry, G (ed.), Weekly Volcanic Activity Report, 10 January-16 January 2001. Smithsonian Institution and US Geological Survey.
8.73°S, 120.98°E; summit elev. 1559 m
All times are local (unless otherwise noted)
A minor explosion on 11 January 2001 at 1915 produced an ashfall deposit less than 0.5 mm thick in Bajawa (~8 km from the source). On 13 January 2001 at 0700 three explosions occurred, sending a plume ~300-1,000 m above the crater rim; it moved eastward towards Toa village and southward towards Boya village, Bajawa, and Bolodio city. Thundering sounds were heard from the observatory (~7.5 km from the summit). Continuous tremor was recorded with an amplitude of 2 mm and 59 explosion earthquake events had been registered as of 15 January. Inielika is at Alert Level 3 (on a scale of 1-4).
Geologic Background. Inielika is a broad, low volcano in central Flores Island that was constructed within the Lobobutu caldera. The complex summit of the 1559-m-high volcano contains ten craters, some of which are lake filled, in a 5-sq-km area north of the city of Bajawa. The largest of these, Wolo Runu and Wolo Lega North, are 750 m wide. The first historical eruption of Inielika, a phreatic explosion that formed a new crater, did not occur until 1905 and was the volcano's only eruption during the 20th century. Another eruption took place about a century later, in 2001. A chain of Pleistocene cinder cones, the Bajawa cinder cone complex, extends southward to Inierie.