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Saint Helena Geography 2009
https://geographic.org/wfb2009/saint_helena/saint_helena_geography.html
SOURCE: 2009 CIA WORLD FACTBOOK

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Saint Helena Geography 2009
SOURCE: 2009 CIA WORLD FACTBOOK


Location:
islands in the South Atlantic Ocean, about midway between South America and Africa; Ascension Island lies 700 nm northwest of Saint Helena; Tristan da Cunha lies 2,300 nm southwest of Saint Helena

Geographic coordinates:
Saint Helena: 15 57 S, 5 42 W
Ascension Island: 7 57 S, 14 22 W
Tristan da Cunha island group: 37 15 S, 12 30 W

Map references:
Africa

Area:
total: 413 sq km
land: Saint Helena Island 122 sq km; Ascension Island 90 sq km; Tristan da Cunha island group 201 sq km
water: 0 sq km

Area - comparative:
slightly more than twice the size of Washington, DC

Land boundaries:
0 km

Coastline:
Saint Helena: 60 km
Ascension Island: NA
Tristan da Cunha: 40 km

Maritime claims:
territorial sea: 12 nm
exclusive fishing zone: 200 nm

Climate:
Saint Helena: tropical marine; mild, tempered by trade winds
Ascension Island: tropical marine; mild, semi-arid
Tristan da Cunha: temperate marine; mild, tempered by trade winds (tends to be cooler than Saint Helena)

Terrain:
the islands of this group result from volcanic activity associated with the Atlantic Mid-Ocean Ridge
Saint Helena: rugged, volcanic; small scattered plateaus and plains
Ascension: surface covered by lava flows and cinder cones of 44 dormant volcanoes; ground rises to the east
Tristan da Cunha: sheer cliffs line the coastline of the nearly circular island; the flanks of the central volcanic peak are deeply dissected; narrow coastal plain lies between The Peak and the coastal cliffs

Elevation extremes:
lowest point: Atlantic Ocean 0 m
highest point: Queen Mary's Peak on Tristan da Cunha 2,062 m; Green Mountain on Ascension Island 859 m; Mount Actaeon on Saint Helena Island 818 m

Natural resources:
fish, lobster

Land use:
arable land: 12.9%
permanent crops: 0%
other: 87.1% (2005)

Irrigated land:
NA

Natural hazards:
active volcanism on Tristan da Cunha, last eruption in 1961

Environment - current issues:
NA

Geography - note:
Saint Helena harbors at least 40 species of plants unknown anywhere else in the world; Ascension is a breeding ground for sea turtles and sooty terns; Queen Mary's Peak on Tristan da Cunha is the highest island mountain in the South Atlantic and a prominent landmark on the sea lanes around southern Africa


NOTE: The information regarding Saint Helena on this page is re-published from the 2009 World Fact Book of the United States Central Intelligence Agency. No claims are made regarding the accuracy of Saint Helena Geography 2009 information contained here. All suggestions for corrections of any errors about Saint Helena Geography 2009 should be addressed to the CIA.






This page was last modified 10-Jun-09
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