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Johnston Atoll Geography
Johnston Atoll Geography: A summary of information about Johnston Atoll Geography, from government research data as well as independent research and other sources.
Johnston Atoll: Geography
Location
Oceania, atoll in the North Pacific Ocean, about one-third of the way from Hawaii to the Marshall Islands
Geographic coordinates
16 45 N, 169 30 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
10 km
Maritime claims
exclusive economic zone: 200 nm territorial sea: 12 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
NA; guano deposits worked until depletion about 1890
Land use
arable land: 0% permanent crops: 0% permanent pastures: 0% forests and woodland: 0% other: 100%
Irrigated land
0 sq km (1998)
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; closed to the public; former US nuclear weapons test site; site of Johnston Atoll Chemical Agent Disposal System (JACADS); some low-growing vegetation
