Volcano news & eruption updates: Barren Island
Barren Island (India): weak eruptive activity continues
Thursday Mar 03, 2016 17:18 PM | BY: T
Steam (and ash?) plume from Barren Island on 1 March (red spot is a thermal anomaly detected by the VIIRS radiometer onboard NASA's Suomi NPP)
Weak eruptive activity continues at the summit vent of the remote and rarely directly observed volcano, satellite data indicates.
MODIS hot spots at Barren Island (MIROVA)
A thermal hot spot has been present regularly during recent weeks, and on cloud-free days, a steam-gas plume can often be seen drifting from the island that sometimes contains some ash.
What exactly the activity is like is difficult to say, but most likely is mild strombolian activity and/or the occasional presence of a (very small) lava lake in the summit crater.
Wednesday, Feb 03, 2016
Minor eruptive activity (possibly strombolian) seems to continue on the remote island, at least intermittently. ... [more]
Monday, Nov 23, 2015
With all likelihood, the volcano continues to be in eruption. It is very remote and rarely directly observed, but satellite imagery regularly show albeit weak thermal signals - again present more or less continuously since August and more frequent since October this year. ... [more]
Wednesday, Aug 19, 2015
An ash plume was reported this morning, at estimated 5,000 ft (1.5 km) altitude, extending 50 km to the east from the island (VAAC Darwin). This suggests that a new phase of activity is occurring at the volcano. ... [more]
Saturday, Jun 06, 2015
A steam and ash plume at estimated 10,000 ft (3 km) altitude and extending 35 km to the east from the volcano was detected yesterday on MTSAT satellite imagery (VAAC Darwin). ... [more]
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. 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