RUSSIAN REACH
08/21/2026 |
The Friday File: The deepest hole ever drilled is the Kola Superdeep Borehole, drilled between 1970-1989. It reaches 12.3km, where the temperature is 356F. It’s located on the Kola Peninsula in Northwestern Russia, 155 miles north of the Arctic Circle. Despite its depth, it penetrated just 0.19% of the way to the Earth’s center. Reaching the center would require drilling another 6,359km – if only it were so simple.