The Kola Superdeep Borehole SG-3 (Russian: Кольская сверхглубокая скважина СГ-3, romanized: Kol'skaya sverkhglubokaya skvazhina SG-3) is the deepest human-made hole on …

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), …

Jan 2, 2024 · The Kola borehole reached 40,230 feet (12,262 meters) in 1989, making it the deepest human-made hole on Earth. As of 2023, it remains the deepest known hole created …

The Kola Superdeep Borehole (Russian: Кольская сверхглубокая скважина, Kolskaya sverkhglubokaya skvazhina) was a very deep hole dug on the Kola Peninsula in Russia during …

Apr 10, 2025 · The Kola well has now penetrated about halfway through the crust of the Baltic continental shield, exposing rocks 2.7 billion years old at the bottom (for comparison, the …

Jun 21, 2017 · The Kola Superdeep Borehole was an important site for geophysical study, and it helped scientists gain better understanding of the upper and lower crust and its characteristics. …

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 …

Jul 22, 2016 · Known as the Kola Superdeep Borehole, the human-made hole seems like it should be leftover from a failed oil well, but it's actually the result of over 20 years of Cold War …

Jun 12, 2021 · The purpose of the borehole wasn’t just to drill 15 km, it was to investigate Earth’s crust—and the Kola Superdeep didn’t disappoint. Throughout drilling, hydrogen gas bubbled …

The Kola ultra-deep well was the source of the urban legend of the "well to hell". Legend has it that when the well was drilled to a depth of 14.5 km, the drillers stumbled upon voids, lowered …