It is located in the western Pacific Ocean, an average of 124 miles/200km to the east of the Mariana Islands, in the Western Pacific East of Philippines.
The trench is about 2,550 kilometres (1,580 mi) long with an average width of 69 kilometres (43 mi).
It is a crescent-shaped scar in the Earth's crust, and measures over 1500 miles/2550km long and 43 miles/69km wide on average.
It reaches a maximum-known depth of 10,994 metres (36,070 ft) (± 40 metres [130 ft]) at a small slot-shaped valley in its floor known as the Challenger Deep, at its southern end, although some unrepeated measurements place the deepest portion at 11,034 metres (36,201 ft)
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