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Report on Leroboleng (Indonesia) — 25 June-1 July 2003


Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
25 June-1 July 2003
Managing Editor: Gari Mayberry

Please cite this report as:

Global Volcanism Program, 2003. Report on Leroboleng (Indonesia). In: Mayberry, G (ed.), Weekly Volcanic Activity Report, 25 June-1 July 2003. Smithsonian Institution and US Geological Survey.

Weekly Report (25 June-1 July 2003)



8.365°S, 122.833°E; summit elev. 1095 m

All times are local (unless otherwise noted)

Based on information from an aircraft report, the Darwin VAAC reported that an ash plume from Leroboleng rose to ~1.8 km a.s.l. on 26 June. Ash was not visible on satellite imagery. Leroboleng has not erupted since the 19th century, and results from ground observations are pending.

Geological Summary. Leroboleng volcano, also known as Lereboleng or Lewono, lies at the eastern end of a 4.5-km-long, WSW-ESE-trending chain of three volcanoes straddling a narrow peninsula in NE Flores Island. The summit of Gunung Leroboleng contains 29 small fissure-controlled craters, two containing lakes. A small lava dome occupies one of the craters. Most of the craters originated along three N-S-trending fissures immediately east of the summit of the volcano. The largest crater, 250-m-wide Ili Gelimun, is located SSE of the summit and fed lava flows from a lower south-flank vent. Explosive eruptions were reported from Burak crater during the 19th century.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)