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Montagu Island volcano

Shield volcano 1370 m / 4,495 ft
UK, South Sandwich Islands, -58.42°S / -26.33°W
Current status: dormant (1 out of 5) | Reports
Montagu Island volcano books
Typical eruption style: unspecified
Montagu Island volcano eruptions: 2007
TimeMag. / DepthDistanceLocation
Sun, 18 Feb
Sun, 18 Feb 02:54 UTCM 5.5 / 90 km48 kmSouth Sandwich Islands Region

Background:

The largest of the South Sandwich Islands, Montagu consists of a massive shield volcano cut by a 6-km-wide ice-filled summit caldera. The summit of the 10 x 12 km wide island rises about 3000 m from the sea floor between Bristol and Saunders Islands. Around 90% of the island is ice-covered; glaciers extending to the sea typically form vertical ice cliffs. The name Mount Belinda has been applied both to the high point at the southern end of the summit caldera and to the young central cone. Mount Oceanite, an isolated 900-m-high peak with a 270-m-wide summit crater, lies at the SE tip of the island and was the source of lava flows exposed at Mathias Point and Allen Point. There was no record of Holocene or historical eruptive activity at Montagu until MODIS satellite data, beginning in late 2001, revealed thermal anomalies consistent with lava lake activity that has been persistent since then. Apparent plumes and single anomalous pixels were observed intermittently on AVHRR images during the period March 1995 to February 1998, possibly indicating earlier unconfirmed and more sporadic volcanic activity.
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Smithsonian / GVP volcano information


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