Sirena Deep

submarine feature, Pacific Ocean

Also known as: HMRG Deep

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Last updated

July 20, 2026

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The "Sirena Deep" is a specific location within the Mariana Trench, which is the deepest known oceanic trench on Earth. Located in the western Pacific Ocean, the trench is an arc-shaped depression stretching over 1,580 miles. Sirena Deep is a smaller valley situated south of Guam and east of the Challenger Deep, the trench's deepest point. The Mariana Trench is a result of subduction zones, where tectonic plates collide and one is forced beneath the other.12

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Mariana Trench
…the location) and later renamed Sirena Deep—is situated south of Guam and east of Challenger Deep. First encountered in 1997, its depth has been reported variously as 34,911 and 35,463 feet (10,641 and 10,809 metres).
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…the location) and later renamed Sirena Deep—is situated south of Guam and east of Challenger Deep. First encountered in 1997, its depth has been reported variously as 34,911 and 35,463 feet (10,641 and 10,809 metres).
Read More