How much pressure exists at the bottom of the deepest Pacific Ocean trench?

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high-pressure phenomena Three compression mechanisms in crystals.

At the bottom of the Challenger Deep—the deepest point in the Pacific Ocean and on Earth—the hydrostatic pressure is greater than 1,089 standard atmospheres, which is approximately 16,000 pounds per square inch. In the context of high-pressure phenomena, this is often cited as being about 0.1 gigapascals (roughly 1,000 atmospheres), a pressure equivalent to that found beneath a three-kilometre column of rock.12