Deepest Ocean in the World: The Pacific Ocean is the deepest ocean in the world. The Pacific Ocean is over 63 million square miles, making it the largest and deepest ocean on Earth. It also contains the Mariana Trench, which contains the Challenger Deep, the deepest known point of the Earth’s seabed, at about 10,984 metres (36,037 feet) below sea level.
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Which is the Deepest Ocean in the World?
The Pacific Ocean is the deepest of the five oceans on Earth. The average depth of the Pacific Ocean is about 4,280 metres (14,040 feet). The true extreme of the Ocean is at the Challenger Deep, a narrow, crescent-shaped depression in the Mariana Trench, located east of the Mariana Islands.
The trench was first found in 1875 by the HMS Challenger expedition, and few manned and unmanned journeys have touched the bottom since. The pressure at depth in a submersible is far to exceed 1,000 times the pressure at sea level. An extremely hostile environment has left it largely unexplored.
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Top 5 Deepest Oceans in the World
| Rank | Ocean | Average Depth (Approx.) |
| 1 | Pacific Ocean | 4,280 m (14,040 ft) |
| 2 | Atlantic Ocean | 3,646 m (11,962 ft) |
| 3 | Indian Ocean | 3,741 m (12,274 ft) |
| 4 | Southern Ocean | 3,270 m (10,728 ft) |
| 5 | Arctic Ocean | 1,205 m (3,953 ft) |
Interesting Facts About the Pacific Ocean
- The Pacific Ocean is the largest and deepest ocean on Earth, covering over 30% of the planet's surface and containing more than half of the world's oceanic water.
- Surrounded by the "Ring of Fire": The Pacific basin is encircled by the "Ring of Fire," a zone of intense seismic and volcanic activity where about 90% of the world's earthquakes and 75% of its volcanoes occur.
- The Pacific is Saltier in the North, Fresher in the South: Due to global current patterns, evaporation rates, and rainfall, the northern Pacific is generally saltier than the southern Pacific. This salinity difference drives immense ocean currents and plays a role in global thermohaline circulation, affecting climate.
- When you think of the world's tallest mountain, Mount Everest usually comes to mind. But if you measure from base to peak, not just sea level, the true record holder is Mauna Kea in Hawaii, located in the Pacific Ocean.
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