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World Factbook: Johnston Atoll Geography


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Johnston Atoll



Johnston Atoll Geography:

Location:
Oceania, atoll in the North Pacific Ocean 717 nm (1328 km) southwest of Honolulu, Hawaii, about one-third of the way from Hawaii to the Marshall Islands

Geographic coordinates:
16 45 N, 169 31 W

Map references:


Area:
total: 2.8 sq km
land: 2.8 sq km
water: 0 sq km

Area - comparative:
About 4.7 times the size of The Mall in Washington, DC

Land boundaries:
total: 0 km
border countries: NA

Coastline:
34 km

Maritime claims:
territorial sea: 12 NM
exclusive economic zone: 200 NM

Climate:
Tropical, but generally dry; consistent northeast trade winds with little seasonal temperature variation

Terrain:
Mostly flat

Elevation extremes:
lowest point: Pacific Ocean 0 m
highest point: Summit Peak 5 m

Natural resources:
Guano deposits worked until depletion about 1890, terrestrial and aquatic wildlife

Land use:
arable land: 0%
permanent crops: 0%
other: 100%
(2001)

Irrigated land:
0 sq km (1998 est.)

Natural hazards:
NA

Environment - current issues:
No natural fresh water resources

Environment - international agreements:
party to: NA
signed, but not ratified: NA

Geography - Note:
Strategic location in the North Pacific Ocean; Johnston Island and Sand Island are natural islands, which have been expanded by coral dredging; North Island (Akau) and East Island (Hikina) are manmade islands formed from coral dredging; the egg-shaped reef is 34 km in circumference; closed to the public; a former US nuclear weapons test site; site of now-closed Johnston Atoll Chemical Agent Disposal System (JACADS); most facilities dismantled and cleanup complete in 2004; some low-growing vegetation


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Washington D.C.: Central Intelligence Agency, 2005
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