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The 23-centimetre-diameter (9 in) boreholes were drilled by branching from a central hole. [1] The deepest reached 12,262 metres (40,230 ft; 7.619 mi) in 1989, the deepest human-made hole on Earth, and remains so as of 2024 . In terms of true vertical depth, it remains the deepest borehole in the world.
Oct 20, 2023 · The Kola Superdeep Borehole, located in Russia, is the world's deepest man-made hole, reaching a depth of 40,230 feet (12,262 meters) or 7.6 miles (12.2 kilometers), surpassing the depth of the Mariana Trench and the height of Mount Everest.
May 6, 2019 · This is the Kola Superdeep Borehole, the deepest manmade hole on Earth and deepest artificial point on Earth. The 40,230ft-deep (12.2km) construction is so deep that locals swear you can hear...
Feb 22, 2020 · Known as the Kola Superdeep Borehole, the deepest hole ever dug reaches approximately 7.5 miles below the Earth’s surface (or 12,262 meters), a depth that took about 20 years to reach.* The...
May 21, 2021 · The borehole itself was actually made up of numerous holes that branch off from a central hole, the deepest of which — SG-3 — runs 12,261 meters (40,226 feet) deep into Earth’s crust. Despite...
- Tom Hale
Jul 22, 2016 · Lying below a small, nondescript rusty cap in Murmansk, Russia, is the deepest hole ever drilled, reaching a whopping 12 kilometres (7.5 miles) into the Earth’s crust.
