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Report on Lewotobi (Indonesia) — 7 October-13 October 2015


Lewotobi

Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 7 October-13 October 2015
Managing Editor: Sally Sennert.

Please cite this report as:

Global Volcanism Program, 2015. Report on Lewotobi (Indonesia) (Sennert, S, ed.). Weekly Volcanic Activity Report, 7 October-13 October 2015. Smithsonian Institution and US Geological Survey.

Weekly Report (7 October-13 October 2015)

Lewotobi

Indonesia

8.542°S, 122.775°E; summit elev. 1703 m

All times are local (unless otherwise noted)


PVMBG reported that white plumes were observed rising 15 m above Lewotobi during periods of clear weather from 1 Septmber-6 October. Seismicity declined significantly during the previous three months and became stable. The Alert Level was lowered to 1 (on a scale of 1-4) on 7 October.

Geological Summary. The Lewotobi edifice in eastern Flores Island is composed of the two adjacent Lewotobi Laki-laki and Lewotobi Perempuan stratovolcanoes (the "husband and wife"). Their summits are less than 2 km apart along a NW-SE line. The conical Laki-laki to the NW has been frequently active during the 19th and 20th centuries, while the taller and broader Perempuan has had observed eruptions in 1921 and 1935. Small lava domes have grown during the 20th century in both of the summit craters, which are open to the north. A prominent cone, Iliwokar, occurs on the E flank of Perampuan.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)