Guam Geography - 2006

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

Climate:
tropical marine; generally warm and humid, moderated by northeast trade winds; dry season (January to June), rainy season (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: 3.64%
permanent crops: 18.18%
other: 78.18% (2005)

Irrigated land:
NA

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