GeoThermal

Deep beneath the earth's surface, hot magma heats the underlying water or steam that can power a turbine to produce electricity.

Geothermal Energy is heat (thermal) derived from the earth (geo). It is the thermal energy contained in the rock and fluid (that fills the fractures and pores within the rock) in the earth's crust.

Washington Geothermal Resources

Energy Efficiency and Renewable Energy Network (EREN), U.S. Department of Energy (DOE), Geothermal Energy Program, includes introduction to geothermal energy and other resources.

Geothermal Education Office

Geothermal Resources Council