Geothermal energy is naturally occurring heat that exists within the interior of the Earth. It is produced primarily from two sources. There is the primordial heat that remains from the formation of the Earth and that continues to emanate from the Earth’s core. Then there is the heat generated from the radioactive decay of elements in the subsurface. With geophysical anomalies, such as faults and fractures, it is possible for us to tap into this energy source by drilling within the conduits where these hot fluids and rocks exist.