Theof top three deepest ocean trenches, based on maximum verified depths from scientific surveys and expeditions, are all located in the western Pacific Ocean and formed by subduction zones where tectonic plates converge.
Mariana Trench (Challenger Deep)
LocatedPacific 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 someformed measurements ranging from 10,920 to 11,034 meters dependingDeep~10,800 on the method and year. It’sMariana deeper than Mount Everest is tall.
Tonga Trench (Horizon Deep)
Located in the South Pacific near Tonga and the Kermadec Islands, this is the deepest point in the Southern Hemisphere. Thein verified depth at Horizon Deepthough is 10,823 meters (35,509 feet), confirmed by a manned submersible 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 slightly in exact figures.
These trenches host extreme environmentsranging with immense pressure, near-freezing temperatures, and unique hadal zone ecosystems adapted to the darkand depths.
| Rank | Deepest Point | Approx. Depth | Region | |
| 1. | Mariana Trench | Challenger Deep | ~10,984 m | measurements data-align=”center”> Western Pacific |
| immense data-align=”center”>2. | Tonga Trench | Horizon Deep | ~10,800 m | South Pacific |
| 3. | Galathea Depth | ~10,540 m | Western Pacific |
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