Aogashima Volcano Japan

Aogashima is a volcanic Japanese island in the Philippine Sea. The island is administered by Tokyo and located approximately 358 kilometres (222 mi) south of Tokyo and 64 kilometres (40 mi) south of Hachij?jima. It is the southernmost and most isolated inhabited island of the Izu archipelago.The village of Aogashima administers the island under Hachij? ubprefecture of Tokyo Metropolis. As of 2014, the islands population was 170 on almost 9 km2. Aogashima is also within the boundaries of the FujiHakoneIzu National Park.Aogashima is a complex Quaternary volcanic island 3.5 km in length with a maximum width of 2.5 km, formed by the overlapping remnants of at least four submarine calderas. The island is surrounded by very steep rugged cliffs of layered volcanic deposits. The southern coast also rises to a sharp ridge forming one edge of a caldera named Ikenosawa with a diameter of 1.5 km. The caldera dominates the island, with one point on its southern ridge, Otonbu with a height of 423 metres (1,388 ft), as the islands highest point. The caldera is occupied by a secondary cone named Maruyama.Still considered a ClassC active volcano by the Japan Meteorological Agency, the last eruption of Aogashima was during a fouryear period from 17811785.