Okinawa Trough

The Okinawa Trough (沖縄トラフ, Okinawa Torafu) (also called Chinese: 中琉界沟, literally China-Ryukyu Border Trough^[1] ) is a seabed feature of the East China Sea. It is an active, initial back-arc rifting basin which has formed behind the Ryukyu arc-trench system in the West Pacific. It developed where the Philippine Sea Plate is subducting under the Eurasia Plate.^[2]

^ "Chronology of Defending Diaoyu Islands". Tsinghua University (Beijing) Library. Archived from the original on 3 December 2013. Retrieved 3 June 2013. 横渡中琉界沟黑水沟，进入"琉球大洋"，乃因此沟以东属琉球海域，以西包括钓鱼台列屿乃属中国海域。
^ Thakur, Naresh Kumar et al. (2010). Exploration of Gas Hydrates: Geophysical Techniques, p. 119., p. 119, at Google Books

[1] "Chronology of Defending Diaoyu Islands". Tsinghua University (Beijing) Library. Archived from the original on 3 December 2013. Retrieved 3 June 2013. 横渡中琉界沟黑水沟，进入"琉球大洋"，乃因此沟以东属琉球海域，以西包括钓鱼台列屿乃属中国海域。

[2] Thakur, Naresh Kumar et al. (2010). Exploration of Gas Hydrates: Geophysical Techniques, p. 119., p. 119, at Google Books

[1]

[2]