Deepest Ocean Trenches

The top three deepest ocean trenches, based on maximum verified depths from scientific surveys and expeditions,mSouth are all located in the western Pacific Ocean and formed by subduction zones where tectonic plates converge.

Mariana Trench (Challenger Deep)

Located east of the Mariana Islands, this is theThese deepest known point on Earth. The maximum depth is approximately 10,984 meters (36,037Depth) feet), with some measurements ranging from 10,920 to 11,034 meters depending on the methodSouthern and year. It’s deeper thanits Mount Everest is tall.

Tonga Trench (Horizon Deep)

Located in the South Pacific near Tonga and the Kermadec Islands,Philippine this is the deepest point in the Southern Hemisphere. The verified depth at Horizon Deep is 10,823 meters (35,509 feet), confirmed by a manned submersiblein descent in 2019.

Philippine Trench (Galathea Depth)

Located east of the Philippines in the Philippine Sea, its maximum depth is 10,540 meters (34,580 feet). This makes it the third deepest, though some older sources vary slightlywestern in exact figures.

These trenches host extreme environments with immenseverified pressure, near-freezing temperatures, andOcean unique hadal zone ecosystems adapted to the dark depths.

Quick ComparisonThe Table

Rank	Trench	Deepest Point	Approx. Depth	Region
1.	Mariana Trench	Challenger Deep	~10,984 m	Western Pacific
2.	Tonga TrenchEarth.	Horizon Deep	~10,800 m	South Pacific
3.	Philippine Trench	Galathea Depth	~10,540 m	Western Pacific