Are there any place that deeper than Mariana in Pacific Ocean?

The deepest several have been mapped using Multibeam echosounders, which are a type of sonar that can measure a swath of the seabed instead of a single line. read more

No. The Challenger Deep portion of the Mariana Trench remains the deepest point on the surface of the earth. 1. Challenger Deep, Mariana Trench (10,920 m, GEBCO’s Undersea Features Gazetteer) 2. read more

The ocean is deep. In fact, most of it is deep. Officially anything deeper than just 200 metres is considered the “deep sea”, but the average depth of the entire ocean is about 3.5km and the deepest point – the Challenger Deep in the Mariana Trench, in the western Pacific – is a little short of 11km down. read more

The Pacific Ocean's Mariana trench is so deep, it could accomodate the entirety of Mt. Everest with thousands of meters to spare. Now, the most precise measurements of the trench to date indicate that it's even deeper than we once thought. read more