The sound recorded in the Mariana Trench, the deepest part of the world ocean and the deepest place on the Earth’s crust, which is located in western North Pacific. Mariana Trench forms the boundary between two lithospheric plates, where the Pacific plate is highlighted under the Philippine plate.
This strange sound was first noticed by a team of scientists led by biologist Sharon Niukirk from Oregon State University. They have published research in the Journal of the acoustic Association of America.
Scientists still are not sure what kind of sound it is because the entire frequency range was from 38 to 8,000 hertz.
— Business Insider (@businessinsider) December 28, 2016