Project Obsidian will be the world's first geothermal power plant to extract energy from rock at 300 to 500 degrees Celsius. The millimeter wave drilling technique allows drilling to reach depths and temperatures that conventional drills cannot handle.
Fervo Energy has drilled its hottest well yet at a new geothermal site in Utah, with measured temperatures exceeding 555°F at approximately 11,200 feet deep. Fervo pumps cold water underground, where it is heated by the Earth's natural heat. The water is then brought back to the surface.