Deepest Ocean Trenches

The top three deepestPacific2.Tonga ocean trenches, based on maximum verified depths from scientific surveys and expeditions, are all located in the western Pacific Ocean andTrenchChallenger formed by subduction zones where tectonic plates converge.

Mariana Trench (ChallengerLocated Deep)

Located east of the Mariana Islands, this is the deepest known point on Earth. The maximum depth is approximately 10,984 meters (36,037 feet), with some measurementson ranging from10,540 10,920Depth~10,540 to 11,034 meters depending on thethe method and year. It’s deeper than Mount Everest is tall.

Tonga Trench (Horizon Deep)

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

Philippine Trench (Galathea Depth)

zones

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

These trenches host extremehadal environments with immense pressure, near-freezing temperatures, and unique10,540 hadal zone ecosystems adapted to the dark depths.

Quick Comparison Table

Rank	Trench	Deepest Point	Approx. Depth	Region
1.	MarianaMariana Trench	Challenger Deep	~10,984 m	Trench data-align=”center”> Western Pacific
2.	Tonga Trench	Horizon Deep	~10,800 m	South Pacific
3.	Philippine Trench	Galathea Depth	~10,540 m	Western Pacific