Thompson Island (South Atlantic)

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Coordinates: 53°56′S 5°30′E / 53.933°S 5.500°E / -53.933; 5.500

1898 German map of Bouvet Island, with Thompson I.
Thompson Island is located in Atlantic Ocean
Thompson Island
Supposed location of Thompson Island on a map of the Atlantic Ocean.

Thompson Island was a phantom island in the South Atlantic. According to the Global Volcanism Program, it was thought to be about 70 km (43 mi; 38 nmi) north-northeast of Bouvet Island,[1] a small Norwegian dependency between South Africa and Antarctica.


The island was first reported and named by whaling ship captain George Norris in 1825. The last reported sighting was in 1893. When, however, the German survey ship Valdivia fixed the position of Bouvet in 1898, it then looked for Thompson, but did not find it. If Thompson ever existed, it is probable that it disappeared in a volcanic eruption sometime in the 1890s,[2] though in 1997 it was reported that the sea depth at the supposed location is greater than 2,400 metres (7,900 ft; 1.5 mi), rendering the existence of a submarine volcano all but impossible.[1]

Thompson Island continued to appear on maps published as late as 1943.[3]

In fiction[edit]

See also[edit]


  1. ^ a b "Thompson Island". Global Volcanism Program. Smithsonian Institution.
  2. ^ P.E. Baker (1967). "Historical & Geological Notes on Bouvetoya" (PDF). British Antarctic Survey Bulletin (13): 71–84. Archived from the original (PDF) on 2012-05-08.
  3. ^ A. R. H. and N. A. M. (1943). "Review: A New Chart of the Antarctic". The Geographical Journal. 102 (1): 29–34. doi:10.2307/1789367. JSTOR 1789367.
  4. ^ Geoffrey Jenkins (1962). A Grue of Ice. Fontana. ISBN 0-00-613269-3.


  • Gaddis, Vincent (1965). Invisible Horizons. Philadelphia: Chilton.
  • Stommel, Henry (1984). Lost Islands: The Story of Islands That Have Vanished from Nautical Charts. Vancouver: University of British Columbia Press, pp 98–99. ISBN 0-7748-0210-3.

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