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Disputes - international:
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This page was last updated on 20 October, 2005

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@Johnston Atoll

Introduction Johnston Atoll

Background:
Both the US and the Kingdom of Hawaii annexed Johnston Atoll in
1858, but it was the US that mined the guano deposits until the late
1880s. Johnston and Sand Islands were designated wildlife refuges in
1926. The US Navy took over the atoll in 1934, and subsequently the
US Air Force assumed control in 1948. The site was used for
high-altitude nuclear tests in the 1950s and 1960s, and until late
in 2000 the atoll was maintained as a storage and disposal site for
chemical weapons. Munitions destruction is now complete. Cleanup and
closure of the facility was completed in 2004.

Geography Johnston Atoll

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:
Oceania

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:
0 km

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

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-close