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In 2015, researchers found that the volcano's structure bore patterns of magnetic striping on either side, indicating that the volcano is likely a hybrid of a mid-ocean ridge and a shield volcano. Geologic data also indicated that Tamu Massif formed at the junction of three mid-ocean ridges, which was a highly unusual occurrence. [14]
Quaternary Volcanoes of Japan - Geological Survey of Japan; Volcano on Google Map - Geological Survey of Japan; The National Catalogue of the Active Volcanoes in Japan - Japan Meteorological Agency; 日本の主な山岳標高 (Elevation of Principal Mountains in Japan) - Geospatial Information Authority of Japan (in Japanese)
Earlier eruptions built the white sand highlands in the region. On September 13, 2016, a team of experts from Bristol University and the Sakurajima Volcano Research Centre in Japan suggested that the volcano could have a major eruption within 30 years; since then two eruptions have occurred. [6] Sakurajima is a stratovolcano.
Kaimondake (開聞岳, Kaimon-dake), or Mount Kaimon, is an undissected [i] volcano – consisting of a basal stratovolcano and a small complex central lava dome [2] – which rises to a height of 924 metres above sea level near the city of Ibusuki in southern Kyūshū, Japan. The last eruption occurred in the year 885 CE.
In 2010, the Japanese coast guard spotted steam rising one kilometer (0.62 mi) above the ocean and water discoloration of the surrounding area. [1] In 2021, the Japan Meteorological Agency (JMA) reported that a submarine eruption occurred at Fukutoku-Okanoba volcano at 6:20 a.m. local time on August 13. [4]
It is the highest mountain in Japan, the second-highest volcano located on an island in Asia (after Mount Kerinci on the Indonesian island of Sumatra), and seventh-highest peak of an island on Earth. [1] Mount Fuji last erupted from 1707 to 1708.
The seamount, located 150 km (93 mi) southwest of Chichijima and 146 km (91 mi) north of the more famous Iwo Jima, is a triple-peaked seamount.The 2 southern peaks, from west to east, Saikai Tokuba and the Tokai Tokuba are the primary peaks of this seamount complex, with each of them with a depth of −95 m (−312 ft) and −100 m (−328 ft) in their respective order.
Aira caldera is located at Kyushu, the southernmost island of Japan. The supervolcano peaks at 1117 m. [6]The eruption forming the Aira Caldera, occurred approximately 30,000 years ago, and resulted in tephra and ignimbrite from a vast amount of magma affecting the nearby land.