what is the name of the deepest known location in the earth's oceans
1. Mariana Trench. Better known as the deepest point on earthâs surface, this trench lies in Pacific Ocean, at Challenger Deep. Located at a depth of about 10.91 km or 11,033 meter below sea level, this trench runs for 2,550 kilometer, somewhere below the expanse of water lying between Australia and Japan. Credits: Kmusser/wikipedia.org.