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Guam (territory of the US) Geography

    Location: Oceania, island in the North Pacific Ocean, about three-quarters of the way from Hawaii to the Philippines

    Geographic coordinates: 13 28 N, 144 47 E

    Map references: Oceania

    Area:
    total: 541.3 sq km
    land: 541.3 sq km
    water: 0 sq km

    Area—comparative: three times the size of Washington, DC

    Land boundaries: 0 km

    Coastline: 125.5 km

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

    Climate: tropical marine; generally warm and humid, moderated by northeast trade winds; dry season from January to June, rainy season from July to December; little seasonal temperature variation

    Terrain: volcanic origin, surrounded by coral reefs; relatively flat coralline limestone plateau (source of most fresh water), with steep coastal cliffs and narrow coastal plains in north, low-rising hills in center, mountains in south

    Elevation extremes:
    lowest point: Pacific Ocean 0 m
    highest point: Mount Lamlam 406 m

    Natural resources: fishing (largely undeveloped), tourism (especially from Japan)

    Land use:
    arable land: 11%
    permanent crops: 11%
    permanent pastures: 15%
    forests and woodland: 18%
    other: 45% (1993 est.)

    Irrigated land: NA sq km

    Natural hazards: frequent squalls during rainy season; relatively rare, but potentially very destructive typhoons (especially in August)

    Environment—current issues: extirpation of native bird population by the rapid proliferation of the brown tree snake, an exotic species

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

    Geography—note: largest and southernmost island in the Mariana Islands archipelago; strategic location in western North Pacific Ocean

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Revised 1-Mar-99
Copyright © 1999 Photius Coutsoukis (all rights reserved)