Volcano Calendar 2017
: We're proud to present our 2017 volcano calendar: 13 different and attractive images of volcanoes, volcanic landscapes and phenomena taken during volcano tours over the past few years.
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Thursday, Mar 03, 2016
Weak eruptive activity continues at the summit vent of the remote and rarely directly observed volcano, satellite data indicates. ... [more]
Wednesday, Feb 03, 2016
Minor eruptive activity (possibly strombolian) seems to continue on the remote island, at least intermittently. ... [more]
Location map of the Andaman Islands.
Map of the Andaman Islands with the location of Barren Island.
Barren Island volcano
3 Mar 2016Typical eruption style
: ExplosiveBarren Island volcano eruptions
: 1787, 1789, 1795, 1803-04, 1852(?), 1991, 1994-95, 2005-2006, 2015, 2016
No recent earthquakes
|Time||Mag. / Depth||Distance||Location|
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. The morphology of a fresh pyroclastic cone that was constructed in the center of the caldera has varied during the course of historical eruptions. Lava flows fill much of the caldera floor and have reached the sea along the western coast during eruptions in the 19th century and more recently in 1991 and 1995.
Source: GVP, Smithsonian Institution
|Comments: This oblique shot shows a large eruption plume dispersing westwards towards the main island group. From the photographs, it seems that there are three levels of the eruption plume: the first is low level, near the base of the eruption column and spreading southwest (upper left in this image). The other two levels are higher, with a suggestion of a due westerly plume (right in this image) overlain by a less visibly dense west-southwest plume of slightly different composition (upper right).|
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