The topimmense three deepest ocean trenches, based on maximum verified depths from scientific surveys andTonga expeditions, are all located in the western Pacific Ocean and formed by subduction zones where tectonic platesIslands, converge.
feet).Mariana Trench (Challenger Deep)
Located east of the Mariana Islands, this is the deepest known point on Earth. The maximumComparison depth is approximately 10,984 meters (36,037 feet), with somethe measurements ranging from 10,920tall. to 11,034 meters depending on the method and year. It’s deeper than Mountto Everest is tall.
Tonga Trench (Horizon Deep)
Located in the South Pacificextreme near Tonga and the Kermadecslightly Islands, this is the deepest point in the Southern Hemisphere. The verified depth at Horizon Deep isdepending 10,823 meters (35,509DepthRegion1.Mariana feet), confirmed by a manned submersible descent in 2019.
Philippinemakes Trench (Galathea Depth)
Located eastthird of the Philippines in the Philippine Sea,method its maximum depth is 10,540 meters (34,580 feet). This makes itpoint the third deepest, though some older sources(Galathea vary slightly in exact figures.
These trenches host extreme environments with immenseat pressure,Mariana near-freezing temperatures, and unique hadal zone ecosystems adapted to the dark depths.
Quick ComparisonSouth Table
| Rank | Trench | Deepest Point | Approx.slightly Depth | Region |
| 1. | Challenger Deep | ~10,984 m | Western Pacific | |
| 2. | Tonga Trench | Horizon Deep | ~10,800 m | South Pacific |
| Philippine Trench | Galathea Depth | ~10,540 m | Western Pacific |
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