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Volcanic activity on the island itself was last recorded in 2002, accompanied by earthquake swarms. The main peak on the island, Iō-yama (硫黄山) has a height of 394 m (1,293 ft), and the island has a circumference of 6.5 km (4.0 mi). The total area of the island is 4.79 km 2 (1.85 sq mi).
The Izu Islands are divided into two towns (Oshima and Hachijojima) and six villages (the remaining inhabited islands.) Three subprefectures are formed above the municipalities as branch offices of the metropolitan government. [citation needed] All the islands (more than a dozen in total) lie within the Fuji-Hakone-Izu National Park.
As with the other islands in the Izu Island group, Izu Ōshima forms part of the Fuji-Hakone-Izu National Park. [2] Izu Ōshima, at 91.06 km 2 (35.16 sq mi) is the largest and closest of Tokyo's outlying islands, which also include the Ogasawara Islands.
The island is administered by the village of Aogashima, which is subordinate to the Hachijō Subprefecture, which itself is governed by the City of Tokyo. The island has an area of 8.75 km 2 (3.38 sq mi), and, as of 2014, its population is a mere 170 people. This means that the village of Aogashima has the smallest population of any ...
The only recorded eruption was an event on 13 July 1989. Two earthquakes, on 30 June and 9 July took, place on the Izu-Tobu Volcano.On 13 July, a seismometer recorded seismicity, a research vessel, the RV Takuyo reported hearing an explosion sound from the sea floor followed by a 30-second vibration at 18:33 pm.
Miyake-jima (三宅島, "Miyake Island") is a volcanic island in the Izu archipelago in the Philippine Sea approximately 180 kilometers (110 mi) southeast of Tokyo, Japan. [1] As with the other islands in the Izu Island group, Miyake-jima forms part of the Fuji-Hakone-Izu National Park .
Myōjin-shō (明神礁) is a submarine volcano located about 450 kilometers south of Tokyo on the Izu-Ogasawara Ridge in the Izu Islands. Volcanic activity has been detected there since 1869. Since then it has undergone more eruptions, the most powerful of which resulted in the appearance and disappearance of a small island.
Kōzu-shima (神津島) is a volcanic Japanese island in the Philippine Sea. [1] The island is administered by Tōkyō and is located approximately 30 kilometres (19 mi) northwest of the Miyake-jima and 14 kilometres (8.7 mi) southwest of the Nii-jima. It is one of the Izu Seven Islands, a group of the seven northern islands of the Izu archipelago.