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Guam 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: 549 sq km
water: 0 sq km
land: 549 sq km
Area - comparative:
three times the size of Washington, DC
Land boundaries:
0 km
Coastline:
125.5 km
Maritime claims:
territorial sea: 12 nm
exclusive economic zone: 200 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 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: 9.09%
permanent crops: 16.36%
other: 74.55% (2001)
Irrigated land:
NA sq km
Natural hazards:
frequent squalls during rainy season; relatively rare, but potentially very destructive typhoons (June - December)
Environment - current issues:
extirpation of native bird population by the rapid proliferation of the brown tree snake, an exotic, invasive species
Geography - note:
largest and southernmost island in the Mariana Islands archipelago; strategic location in western North Pacific Ocean
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