Report on Barren Island (India) — 22 November-28 November 2006

Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 22 November-28 November 2006
Managing Editor: Sally Kuhn Sennert

Please cite this report as:

Global Volcanism Program, 2006. Report on Barren Island (India). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 22 November-28 November 2006. Smithsonian Institution and US Geological Survey.

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Barren Island

India

12.278°N, 93.858°E; summit elev. 354 m

All times are local (unless otherwise noted)


The Darwin VAAC reported that a diffuse plume from Barren Island was visible on satellite imagery on 27 November. The height and direction of the plume were not reported.

Geologic Background. Barren Island, a possession of India in the Andaman Sea about 135 km NE of Port Blair in the Andaman Islands, is the only historically active volcano along the N-S-trending volcanic arc extending between Sumatra and Burma (Myanmar). The 354-m-high island is the emergent summit of a volcano that rises from a depth of about 2250 m. The small, uninhabited 3-km-wide island contains a roughly 2-km-wide caldera with walls 250-350 m high. The caldera, which is open to the sea on the west, was created during a major explosive eruption in the late Pleistocene that produced pyroclastic-flow and -surge deposits. Historical eruptions have changed the morphology of the pyroclastic cone in the center of the caldera, and lava flows that fill much of the caldera floor have reached the sea along the western coast.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)