what is the deepest hole ever drilled into the earth?
The deepest hole drilled into the earth was begun in 1970 on the Kola Peninsula, Russia. It reached a depth of 7.6 miles of its planned 9.3 miles. Current deep drilling projects include: The San Andreas Scientific Drilling Project in Parkfield CA (2.5 mi); The Hawaii Scientific Drilling Project on Hilo, Hawaii (1.8 mi); a 1.1 mile bore hole into an impact crater in the Chesapeake Bay; and the Integrated Ocean Drilling Project in the Atlantic Ocean (.9mi); Read More about these and other drilling projects going on around the world.
