NOVELTY - The system has an air inlet located at a surface of the earth (1), where air enters the inlet at an ambient temperature. A subterranean chamber is located beneath the surface. A heat exchanger is located in the chamber that includes a naturally occurring geothermal temperature. A fluid flow is induced between the air entering the inlet at the cooler ambient temperature and the air passing through the exchanger that is heated to the geothermal temperature. A power plant is located in the flow path between the inlet and an exhaust outlet that is powered by the induced fluid flow.    USE - Geothermal power generation system for production of power i.e. electrical energy, from naturally occurring geothermal sources i.e. abandoned mine. Can also be used for production of power from missile silo, salt dome and tunnel.    ADVANTAGE - The system provides a constructive use for abandoned mines, so that the cost of mine remediation is justified. The system creates an economic opportunity that is beneficial to society by providing renewable non polluting energy and removing environmental and safety hazards. The system provides an economic stimulus to the present and the former mining towns where the geological formations are to be found. The system reduces the production of green house gases by decreasing the amount of electricity produced by the combustion of hydrocarbon fuels. The system provides significant amounts of alternative energy to reduce dependence upon the availability of petroleum products from oil exporting nations.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for converting a subterranean geological formation into a geothermal power system.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of a geothermal power generation system and the system components.    Earth (1)    Vertical intake shaft (2)    Cavern access tunnel (6)    Air induction chamber (11)    Filter (50)    Boiler (70)    Tornado chamber (100)