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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.
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 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.
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 ...
3 Izu Islands. 4 Ogasawara ... Name Elevation (m) Elevation (ft) ... The Ogasawara Archipelago include the Bonin Islands and Volcano Islands. Name Elevation (m ...
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.
Suiyo Seamount is a seamount (submarine volcano) off the eastern coast of Japan, directly south of Torishima and Sofugan volcano at the southern tip of the Izu Islands.The volcano is one of the Shichiyo Seamounts, a small group of submarine volcanoes named after different days of the week ("Suiyo" means "Wednesday" in Japanese).