Geothermal is related to energy and may refer to:
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Geothermal energy
Geothermal energy is thermal energy extracted from the crust (geology), crust. It combines energy from the formation of the planet and from radioactive decay. Geothermal energy has been exploited as a source of heat and/or electric power for m ...
, useful energy generated and stored in the Earth
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Geothermal activity
Geothermal activity is a group of natural heat transfer processes, occurring on Earth's surface, caused by the presence of excess heat in the subsurface of the affected area, usually caused by the presence of an igneous intrusion underground. Geot ...
, the range of natural phenomena at or near the surface, associated with release of the Earth's internal heat.
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Earth's internal heat budget, accounting of the flows of energy at and below the surface of the planet's crust
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Geothermal gradient
Geothermal gradient is the rate of change in temperature with respect to increasing depth in Earth's interior. As a general rule, the crust temperature rises with depth due to the heat flow from the much hotter mantle; away from tectonic plat ...
, down which heat flows within the Earth
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Geothermal exploration, the search for commercially usable geothermal energy
Uses of geothermal energy
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Earth sheltering, constructing a building into a hill side or Earth berm to reduce heating and cooling requirements
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Earth cooling tubes, using ambient Earth temperature to cool and dehumidify air
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Geothermal desalination, the production of fresh water using heat energy extracted from underground rocks
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Geothermal heating, methods of heating and cooling a building using underground heat
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Geothermal power
Geothermal power is electricity generation, electrical power generated from geothermal energy. Technologies in use include dry steam power stations, flash steam power stations and binary cycle power stations. Geothermal electricity generation i ...
, electricity generated from naturally occurring geological heat sources
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Ground source heat pump, a device used for heating and cooling using the earth as a heat reservoir
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Direct exchange geothermal heat pump, a method of heating and cooling with the energy of the earth using direct exchange of heat
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Hot dry rock geothermal energy
Hot dry rock (HDR) is an extremely abundant source of geothermal energy that is difficult to access. A vast store of thermal energy is contained within hot – but essentially dry and impervious crystalline basement rocks found almost everywhere d ...
, heating water in hot deep rock
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