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Challenger Deep


The Challenger Deep is the deepest place in the world’s oceans. It is located at the southern end of the Mariana Trench. Mariana Trench is a crescent-shaped trench in the Western Pacific Ocean.

It is located near the Mariana Island. The official depth estimated by geologists is 39,994 feet. It was discovered during an expedition aboard HMS Challenger in March 1875. The Mariana Trench is quite narrow with an average width of around 69 kilometers.


Quick Facts: –

  • There have been only 3 recorded manned descents into this slot. The first ever descent took place in 1960 by a US Navy submersible Trieste.
  • It was manned by Jacques Piccard and Lieutenant Don Walsh. They stayed on the bottom for 20 minutes.
  • It was measured with sound pulses sent through the ocean.
  • The Mariana Trench was created by the process that occurs in a subduction zone, where two massive slabs of oceanic crust collide.
  • Towards the east of the Challenger Deep, there is Sirena Deep, the ocean’s second deepest point.
  • There are some microbes in this area that feed on Hydrogen and Methane.
  • Approximately 200 different microorganisms have been identified in the mud found at Challenger Deep.
  • The temperature of water here varies between 1°C to 4°C.
  • The bottom of the Mariana Trench is not the closest point to the earth’s center because the earth is not a perfect sphere.



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