{"id":7202,"date":"2026-04-06T16:12:26","date_gmt":"2026-04-06T15:12:26","guid":{"rendered":"https:\/\/www.lovesail.com\/ls-news\/?p=7202"},"modified":"2026-04-11T13:05:43","modified_gmt":"2026-04-11T12:05:43","slug":"the-challenger-deep","status":"publish","type":"post","link":"https:\/\/www.lovesail.com\/ls-news\/the-challenger-deep\/","title":{"rendered":"The Challenger Deep"},"content":{"rendered":"

\u201c\u2026we have better maps of the surface of Mars and the moon than we do the bottom of the ocean. We know very, very little about most of the ocean.\u201d – <\/span>Gene Feldman<\/p>\n

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The Challenger Deep<\/strong> is the deepest known point on Earth. Located at the southern end of the crescent-shaped Mariana Trench<\/strong> in the western Pacific Ocean, it lies approximately 124 miles east of the Mariana Islands<\/strong>.<\/p>\n

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The Mariana Trench<\/h2>\n

The Mariana Trench was formed by a process called subduction, <\/strong>when two tectonic plates meet and one is forced beneath the other.<\/p>\n

In this case, the Pacific Plate<\/strong>, moving westward, is being forced under the Philippine Plate<\/strong>, which moves more slowly. The western edge of the Pacific Plate contains some of the oldest crust and mantle on Earth, making it heavier and denser. As a result, the Philippine Plate rides higher while the Pacific Plate is pushed downwards, creating a deep trough, the Mariana Trench<\/strong>.<\/p>\n

\"The<\/p>\n

The Discovery of the Challenger Deep<\/h2>\n

HMS Challenger<\/em> (1875)<\/h3>\n

The Challenger Deep was first discovered in 1875 by the Royal Navy research vessel HMS Challenger<\/em><\/strong>. This pioneering ship undertook the world\u2019s first global oceanographic expedition, a 3.5-year, 69,000-nautical-mile voyage.<\/p>\n

Using a simple hemp line with iron sinkers attached, the crew recorded a depth of 4,475 fathoms<\/strong> (8,184 m \/ 26,850 ft) in the southern part of what is now known as the Mariana Trench.<\/p>\n

\"HMS<\/p>\n

HMS Challenger II<\/em> (1951)<\/h3>\n

Fast forward to 1951, when another vessel, HMS Challenger II, <\/em><\/strong>conducted a depth sounding in the same area using echo-sounding technology. They recorded a new depth of 5,960 fathoms<\/strong> (10,900 m \/ 35,761 ft). The area was subsequently named Challenger Deep<\/strong> in honour of this vessel.<\/p>\n

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Measuring the Depth<\/h2>\n

The most recent precise measurement was taken in 2010<\/strong> by the United States Center for Coastal & Ocean Mapping<\/strong>, which recorded a depth of 10,994 metres<\/strong> (36,070 ft or 6,011 fathoms) below sea level, with an estimated vertical accuracy of \u00b140 metres.<\/p>\n

To put that into perspective, that\u2019s around 7 miles deep, <\/strong>deeper than Mount Everest<\/strong> is tall (Everest stands at about 5.5 miles above sea level).<\/p>\n

At this depth, in the Hadal zone<\/strong>, the pressure exceeds a staggering 16,000 psi<\/strong>. For comparison, the atmospheric pressure at sea level in your home is about 14.7 psi<\/strong>. These immense pressures make it extremely difficult to explore such deep regions of the ocean.<\/p>\n

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Image Credits<\/h2>\n