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Guam Geography Profile 2018

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LocationOceania, island in the North Pacific Ocean, about three-quarters of the way from Hawaii to the Philippines
Geographic coordinates13 28 N, 144 47 E
Map referencesOceania
Areatotal: 544 sq km
land: 544 sq km
water: 0 sq km
Area - comparativethree times the size of Washington, DC
Land boundaries0 km
Coastline125.5 km
Maritime claimsterritorial sea: 12 nm
exclusive economic zone: 200 nm
Climatetropical marine; generally warm and humid, moderated by northeast trade winds; dry season (January to June), rainy season (July to December); little seasonal temperature variation
Terrainvolcanic 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 extremesmean elevation: NA
elevation extremes: lowest point: Pacific Ocean 0 m
highest point: Mount Lamlam 406 m
Natural resourcesaquatic wildlife (supporting tourism), fishing (largely undeveloped)
Land useagricultural land: 33.4%
arable land 1.9%; permanent crops 16.7%; permanent pasture 14.8%
forest: 47.9%
other: 18.7% (2011 est.)
Irrigated land2 sq km (2012)
Population distributionno large cities exist on the island, though large villages (municipalities) attract much of the population; the largest of these is Dededo
Natural hazardsfrequent squalls during rainy season; relatively rare but potentially destructive typhoons (June to December)
Environment - current issuesfresh water scarcity; reef damage; inadequate sewage treatment; extermination of native bird populations by the rapid proliferation of the brown tree snake, an exotic, invasive species
Geography - notelargest and southernmost island in the Mariana Islands archipelago and the largest island in Micronesia; strategic location in western North Pacific Ocean

Source: CIA World Factbook
This page was last updated on January 20, 2018