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Undersea geographic features of the western Pacific

The Ryukyu arc (琉球弧, Ryūkyū-ko) is a volcanic island arc system of Japan's triple junction formed by the subduction of the Philippine Sea Plate beneath the Eurasian Plate between Ryukyu Trench to the south-east and the Okinawa Trough to north-west.[1] It comprises the entirety of the Ryukyu Islands chain. The Ryukyu and Southwest Honshu arcs together form the southwest trending arm of the Boso Triple Junction.


  1. ^ "Nature in Okinawa" (PDF). 沖繩縣. Retrieved 2012-09-30.[permanent dead link]

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