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Geography of Guam

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(See [detailed map])
(See [detailed map])

This article describes the geography of Guam.

Location
Oceania, island in the North Pacific Ocean, about three-quarters of the way from Hawaii to the Philippines
Geographic coordinates
[13°26′31″N, 144°46′35″E]
Map references
Oceania
Area
* Total: 541.3 km²
* Land: 541.3 km²
* Water: 0 km²
Area--comparative
Three times the size of Washington, DC
Land boundaries
Approximately 30 miles/51 km long and 9 miles/15.3 km wide, narrowing to four miles/6.8 km wide at the center.
Coastline
125.5 km
Maritime claims
* Exclusive economic zone: 200 nm
* Territorial sea: 12 nm
* The southern maritime boundary of Guam forms a border with the Federated States of Micronesia, and the northern maritime boundary forms a border with the Northern Marianas Islands.
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
Commercial fishing (mostly servicing and unloading of long line fleets and commercial vessels), sport fishing of blue marlin, wahoo, mahi mahi, yellow fin tuna, and deep water reef fish, tourism (especially from Japan but increasingly from China and Korea)
Land use
* Arable land: 11%
* Permanent crops: 11%
* Permanent pastures: 15%
* Forests and woodland: 18%
* Other: 45% (1993 est.)
Irrigated land
NA km²
Natural hazards
Frequent squalls during rainy season; relatively rare, but potentially very destructive typhoons (typhoons are possible in any season but most common from August through December)
Environment--current issues
Extirpation of native bird population by the rapid proliferation of the brown tree snake, an exotic species. Island also supports feral populations of introduced deer, pigs and water buffalo.
Geography--note
Largest and southernmost island in the Mariana Islands archipelago; strategic location in western North Pacific Ocean

The U.S. Territory of Guam
 Capital  Hagåtña
 Islands  Cocos Island · Guam
 Villages  Agana Heights · Agat · Asan-Maina · Barrigada · Chalan-Pago-Ordot · Dededo · Hagåtña · Inarajan · Mangilao · Merizo · Mongmong-Toto-Maite · Piti · Santa Rita · Sinajana · Talofofo · Tamuning · Umatac · Yigo · Yona

 Geography   Economy   Demographics   Communications   Transportation 

 


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