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:

tota l: 549 sq km
land : 549 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.)

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

Facts

Guam was ceded to the US by Spain in 1898. Captured by the Japanese in 1941, it was retaken by the US three years later. The military installation on the island is one of the most strategically important US bases in the Pacific.

The Marianas Trench off Guam is the deepest known ocean depth , 39,198 feet.