Ryukyu Trench
Oceanic trench along the southeastern edge of Japan's Ryukyu Islands in the Pacific Ocean / From Wikipedia, the free encyclopedia
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The Ryukyu Trench (琉球海溝, Ryūkyū kaikō), also called Nansei-Shotō Trench, is a 1398 km (868 mi)[1] long oceanic trench located along the southeastern edge of Japan's Ryukyu Islands in the Philippine Sea in the Pacific Ocean, between northeastern Taiwan and southern Japan. The trench has a maximum depth of 7460 m (24,476 ft).[1] The trench is the result of oceanic crust of the Philippine Plate obliquely subducting beneath the continental crust of the Eurasian Plate[2] at a rate of approximately 52 mm/yr.[3] In conjunction with the adjacent Nankai Trough to the northeast, subduction of the Philippine plate has produced 34 volcanoes.[4] The largest earthquake to have been recorded along the Ryukyu Trench, the 1968 Hyūga-nada earthquake, was magnitude 7.5 and occurred along the northernmost part of the trench [3] on 1 April 1968.[5] This earthquake also produced a tsunami.