NASA Space Shuttle image of Agrihan island
|Archipelago||Northern Mariana Islands|
|Area||43.51 km2 (16.80 sq mi)|
|Length||9 km (5.6 mi)|
|Width||6 km (3.7 mi)|
|Highest elevation||965 m (3,166 ft)|
|Highest point||Mount Agrigan|
|Commonwealth||Northern Mariana Islands|
|Population||- uninhabited - (as of 2010)|
Agrihan is a densely forested island, roughly elliptical in shape, with a length of 9 kilometres (5.6 mi) and a width of 6 kilometres (3.7 mi) and an area of 44 square kilometres (17 sq mi). The entire island is a massive stratovolcano which rises over 4,000 meters (13,120 ft) from the ocean floor, and is the fifth largest in the Marianas volcanic arc. At 965 m (3,166 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 (1,640 ft) deep. The caldera floor has several lava flows and two volcanic cones, which were probably created during the April 1917 eruption. The only relatively flat land on the island is along the southeast shoreline and on the north side of the central caldera.
Vegetation includes Swordgrass (Miscanthus floridulus) grasslands on the upper slopes, forests of Coconut Palm (Cocos nucifera), with some Breadfruit (Artocarpus altilis) and Papaya (Carica papaya) on the lower slopes within the deep ravines that descend radially from the summit.
From a European perspective Agrihan was discovered on 11 June 1522 by Gonzalo Gómez de Espinosa and named "Cyco" or "La Griega" (The Greek in Spanish). Espinosa was on the Trinidad as part of Ferdinand Magellan's expedition, and called on the island while attempting to cross the Pacific Ocean to Mexico. The resident Chamorros were hostile and he could not anchor, but kidnapped an islander for information. The Spanish missionary Diego Luis de San Vitores visited Agrihan in 1669 calling it "San Francisco Javier".  In 1695, the natives were forcibly removed to Saipan, and three years later to Guam.
In 1810, settlers from the Kingdom of Hawaii attempted to establish a settlement on Agrihan. In the 1870s, the first coconut plantations were established. Adolph Capelle, a merchant from Brunswick in Germany, leased the island and exported copra, using around 20 seasonal workers from the Caroline Islands. Following the sale of the Northern Marianas by Spain to the German Empire in 1899, Agrihan was administered as part of German New Guinea. During this time, a private firm, the Pagan Society, owned by a German and a Japanese partner, developed more coconut plantations. However, severe typhoons in September 1905 and September 1907 destroyed the plantations and bankrupted the company.
During World War I, Agrihan came under the control of the Empire of Japan and was administered as the South Pacific Mandate. Following World War II, the island came under the control of the United States and was administered as part of the Trust Territory of the Pacific Islands. In 1967, the population was 94 people. Since 1978, the island has been part of the Northern Islands Municipality of the Commonwealth of the Northern Mariana Islands.
Due to increased volcanic activity, the islanders were evacuated in August 1990 when an eruption was feared. However, by 1992, although there were 25 solfataras, a boiling hot spring and several steam vents, no eruption had taken place. In 2000, six people returned to live in one of the original four settlements on the island. However, per the 2010 census, Agrihan was uninhabited.
- "Agrigan". Global Volcanism Program, Smithsonian Institution. http://www.volcano.si.edu/world/volcano.cfm?vnum=0804-16%3D. Retrieved 2007-04-09.
- Robert F. Rogers: Destiny's landfall. A history of Guam. University of Hawai'i Press, Honolulu 1995, ISBN 0824816781, S. 10.
- Sharp, Andrew The discovery of the Pacific Islands Oxford, 1960, p.11.
- Brand, Donald D. The Pacific Basin: A History of its Geographical Explorations The American Geographical Society, New York, 1967, p.119.
- Coello, Francisco "Conflicto hispano-alemán" Boletín de Sociedad Geográfica de Madrid, t.XIX. 2º semestre 1885, Madrid, p.299,300
- Gerd Hardach: König Kopra. Die Marianen unter deutscher Herrschaft 1899–1914. Steiner, Stuttgart 1990, ISBN 3515057625, S. 23f, 32, 46.
- Monatsberichte from Global Volcanism Programm.
|Wikimedia Commons has media related to Agrigan Island.|
- Pascal Horst Lehne and Christoph Gäbler: Über die Marianen. Lehne-Verlag, Wohldorf in Germany 1972.
- Marianas Archipelago Reef Assessment and Monitoring Program[dead link]
- Oceandots.com: Agrihan at the Wayback Machine (archived December 23, 2010)