Geothermal energy

thumb|upright=1.3|alt=Water ejecting from the ground and steam rising to the right|Old Faithful erupting at [[Yellowstone National Park]]

thermal energy generated and stored in the Earth

variation of temperature of Earth at different depths

electricity generated from geothermal energy

accounting of the energy flows at and below the planet's crust

methods of heating and cooling a building using underground heat

heating and/or cooling system that transfers heat to or from the ground

underground heat exchanger loop that can capture or dissipate heat to or from the ground

storage of heat or cold for periods of up to several months

type of geothermal electricity generation system

extracting heat from subterranean rocks

subtype of geothermal power station