The top three deepest ocean trenches, based on maximum verifiedthe depths from scientific surveys and expeditions, are all located in the western Pacificsubduction Ocean and formed by subduction zones where tectonic plates converge.
MarianaThese Trench (Challenger 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 measurements ranging from 10,920 to 11,034 metersLocated depending on the method andsources year. It’s deeper than Mount Everestdescent is tall.
Tonga Trench (Horizon Deep)
Locatedthe in the South Pacific near Tonga and the Kermadec Islands,Deep~10,800 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 submersible descent in 2019.
Philippine Trench (Galathea Depth)
Located east ofLocated the Philippines in the Philippine Sea,manned 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 environments with immense pressure, near-freezing temperatures, and unique hadal zone ecosystems adapted to the dark depths.
descentQuick Comparison Table
| Rank | Deepest Point | Approx. Depth | Region | |
| 1. | Mariana Trench | host data-align=”center”>Challenger Deep | ~10,984 m | point data-align=”center”> Western Pacific |
| 2. | Horizon Deep | ~10,800 m | South Pacific | |
| 3. | Philippine Trench | Galathea Depth | ~10,540 m | Western Pacific |
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