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Report on Lewotolo (Indonesia) — 28 December-3 January 2012

Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 28 December-3 January 2012
Managing Editor: Sally Kuhn Sennert

Please cite this report as:

Global Volcanism Program, 2011. Report on Lewotolo (Indonesia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 28 December-3 January 2012. Smithsonian Institution and US Geological Survey.

Volcano Profile |  Weekly Report (28 December-3 January 2012)


Lewotolo

Indonesia

8.272°S, 123.505°E; summit elev. 1423 m

All times are local (unless otherwise noted)


CVGHM reported that white plumes rose 50-250 m above the summit of Lewotolo during the month of December. Seismicity increased on 31 December and intensified on 2 January, the same day incandescence was observed. Based on visual and seismic observations, CVGHM raised the Alert Level from 1 to 2 (on a scale of 1-4) on 2 January, then later that day raised the Alert Level to 3.

Geologic Background. Anchoring the eastern end of an elongated peninsula that is connected to Lembata (formerly Lomblen) Island by a narrow isthmus and extends northward into the Flores Sea, Lewotolo rises to 1423 m. Lewotolo is a symmetrical stratovolcano as viewed from the north and east. A small cone with a 130-m-wide crater constructed at the SE side of a larger crater forms the volcano's high point. Many lava flows have reached the coastline. Historical eruptions, recorded since 1660, have consisted of explosive activity from the summit crater.

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