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Agrihan (also spelled Agrigan) is a stratovolcano which forms an island in the Northern Mariana Islands in the Pacific Ocean. The entire island is a massive volcano which rises over 4000 m (13123.4 ft) from the ocean floor, and is the fifth largest in the Marianas volcanic arc. At 965 m (3166 ft), its summit is the highest point in Micronesia. The volcano is topped by a large caldera, 1 x 2 km (0.6 x 1.2 mi) in size and about 500 m (1640.4 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 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.
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