Montagu Island

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Coordinates: and other data for this location”>58°25?S 26°23?W? / ?58.417°S 26.383°W? / -58.417; -26.383

NASA satellite photograph of Montagu Island

Captain Carl Anton Larsen

Montagu Island is the largest of the South Sandwich Islands, located in the Weddell Sea off the coast of Antarctica.

The desolate, uninhabited island measures approximately 12 kilometres by 10, with over 90% of its surface permanently covered in ice. The volcano Mount Belinda is its most notable geographic feature, rising to 1370 metres above sea level. Mount Belinda was believed to be inactive prior to the sighting of low-level ash emission and suspected lava effusion in 2002 by the British Antarctic Survey.

The island was first sighted by James Cook in 1775, and named after John Montagu, 4th Earl of Sandwich and the First Lord of the British Admiralty at the time of its discovery. The first recorded landing was made by Carl Anton Larsen in 1908.

In November 2005, satellite images revealed that an eruption of Mount Belinda had created a 90 metre wide molten river flowing to the northern shoreline of the island. The event has expanded the area of the island by 0.2 km², and provided some of the first scientific observations of volcanic eruptions taking place underneath an ice sheet.

Current imaging on Google Earth (as at 8th August 2009) shows the volcano to be active, with a noticeable plume and lava flow. The effects on the ice sheet are visible.

References

• “Montagu Island”. Global Volcanism Program, Smithsonian Institution. http://www.volcano.si.edu/world/volcano.cfm?vnum=1900-081. Retrieved 2009-01-11. 
• First recorded eruption of Mount Belinda volcano (Montagu Island), South Sandwich Islands, Bull Volcanol (2005) 67:415–422 (PDF)
• LeMasurier, W. E.; Thomson, J. W. (eds.) (1990). Volcanoes of the Antarctic Plate and Southern Oceans. American Geophysical Union. pp. 512 pp. ISBN 0-87590-172-7. 
• Mills, William James (2003). Exploring Polar Frontiers: A Historical Encyclopedia, Volume 1. ABC-CLIO. pp. 430 pp. ISBN 1-57607-422-6. 

South Sandwich Islands

Location of Montagu Island

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Retrieved from “http://en.wikipedia.org/wiki/Montagu_Island”
Categories: Islands in the South Sandwich Islands | Volcanoes of the Atlantic Ocean | Volcanoes of South Georgia and the South Sandwich Islands | Uninhabited islands | South Georgia and the South Sandwich Islands geography stubs

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This entry was posted on Monday, February 8th, 2010 at 9:42 pm and is filed under Uncategorized. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.