been reestablished in one of the four original villages, and as of September 2005 there remain nine inhabitants on the island. An expedition organized by John D. Mitchler and Reid Larson made the first known complete ascent to the summit of this peak on June 1, 2018. Geography Agrihan is a densely forested island, roughly elliptical in shape, with a length of and a width of and an area of . The entire island is a massive stratovolcano, called Mount Agrihan, which rises over from the ocean floor, and is the fifth largest in the Marianas volcanic arc. At , 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 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 and within the deep ravines that descend radially from the summit. Climate Demographics As of 1980, the population of Agrihan was 54. See also List of stratovolcanoes References External links Pascal Horst Lehne and Christoph Gäbler: Über die Marianen. Lehne-Verlag, Wohldorf in Germany 1972. Marianas Archipelago Reef Assessment and Monitoring Program Former German colonies Islands of the Northern Mariana Islands Calderas of Oceania Uninhabited islands of the Northern Mariana Islands