King's Trough King's Trough King's Trough is an undersea trough in the Atlantic Ocean. It is located on the east side of the Mid-Atlantic Ridge, northwest of the Açores-Biscay rise and roughly 400 km NNE of the Azores. It is about 400 km long, running in a NW–SE direction. To the east it branches into the Peake Deep and Freen Deep. The center depth is 4500 m. Surrounding the trough are high ridges and seamounts, such as the Antialtair seamount and the Crum seamount complex. Various explanations for the complex have been suggested, ranging from compression a former plate-boundary, transform faulting or
Nankai Trough gas hydrate site The Nankai Trough, as a continuous gas hydrate research site for over more than a decade, is the first fully integrated field study and modern production test well project for offshore natural gas hydrates in the northwest Pacific Ocean. Six wells were successfully drilled to test natural gas hydrate accumulations off the southeastern coast of Japan, and to explore a conventional Tertiary structure. It gave scientists the opportunity to monitor the physical response of gas hydrate deposits and investigate marine gas hydrates in one of the most active earthquake zones on the planet. Research within the Nankai Trough is expected