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Agrihan (also spelled Agrigan) is a stratovolcano
Stratovolcano

A stratovolcano, sometimes called a composite volcano, is a tall, Volcanic cone volcano with many layers of hardened lava, tephra, and volcanic ash....
 which forms an island in the Northern Mariana Islands
Northern Mariana Islands

The Northern Mariana Islands , officially the Commonwealth of the Northern Mariana Islands , is a commonwealth in political union with the United States, occupying a strategic region of the western Pacific Ocean....
 in the Pacific Ocean
Pacific Ocean

The Pacific Ocean is the largest of the Earth's oceanic divisions. Its name is derived from the Latin name Mare Pacificum, "peaceful sea", bestowed upon it by the Portugal explorer Ferdinand Magellan....
. The entire island is a massive volcano which rises over 4,000 m (13,000 ft) from the ocean floor, and is the fifth largest in the Marianas volcanic arc
Volcanic arc

A volcanic arc is a chain of volcanos or mountains formed by plate tectonics as an oceanic tectonic plate subduction under another tectonic plate and produces magma....
. At 965 m (3,166 ft), its summit is the highest point in Micronesia
Micronesia

Micronesia , from the Greek language mikros and nesos , is a subregion of Oceania, comprising hundreds of small islands in the Pacific Ocean....
.






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Agrihan (also spelled Agrigan) is a stratovolcano
Stratovolcano

A stratovolcano, sometimes called a composite volcano, is a tall, Volcanic cone volcano with many layers of hardened lava, tephra, and volcanic ash....
 which forms an island in the Northern Mariana Islands
Northern Mariana Islands

The Northern Mariana Islands , officially the Commonwealth of the Northern Mariana Islands , is a commonwealth in political union with the United States, occupying a strategic region of the western Pacific Ocean....
 in the Pacific Ocean
Pacific Ocean

The Pacific Ocean is the largest of the Earth's oceanic divisions. Its name is derived from the Latin name Mare Pacificum, "peaceful sea", bestowed upon it by the Portugal explorer Ferdinand Magellan....
. The entire island is a massive volcano which rises over 4,000 m (13,000 ft) from the ocean floor, and is the fifth largest in the Marianas volcanic arc
Volcanic arc

A volcanic arc is a chain of volcanos or mountains formed by plate tectonics as an oceanic tectonic plate subduction under another tectonic plate and produces magma....
. At 965 m (3,166 ft), its summit is the highest point in Micronesia
Micronesia

Micronesia , from the Greek language mikros and nesos , is a subregion of Oceania, comprising hundreds of small islands in the Pacific Ocean....
. The volcano is topped by a large caldera, 1 x 2 km (0.6 x 1.2 mi) in size and about 500 m (1,600 ft) deep.

The island was evacuated in 1990 due to the threat of volcanic activity, although in the end no eruption occurred. A settlement has since been reestablished in one of the four original villages, and as of September 2005 there were nine inhabitants. Five years earlier, in the 2000 census
United States Census, 2000

File:US-Census-2000Logo.svgThe Twenty-Second United States Census, known as Census 2000 and conducted by the United States Census Bureau, determined the resident population of the United States on April 1, 2000, to be 281,421,906, an increase of 13.2% over the 248,709,873 persons Enumeration during the United States Census, 1990....
 no population was reported. The island has a total land area of 43.51 km² (16.80 sq mi). Politically it is part of the Northern Islands Municipality
Northern Islands Municipality

Northern Islands Municipality is one of the four main political divisions of the Northern Mariana Islands. It consists of a long string of the northernmost islands of the Northern Marianas, including Farallon de Pajaros, the Maug Islands, Asuncion Island, Agrihan, Pagan Island, Alamagan, Guguan, Zealandia Bank, Sarigan, Anatahan, and Faral...
.


Casta Marianas

See also

  • List of stratovolcanoes
    List of stratovolcanoes

    A list of stratovolcanoes follows below. The Smithsonian's Global Volcanism Program database of Holocene volcanoes lists over 700 stratovolcanoes....


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