Espa ol: Geothermal power technologies Spanish: Sketch of geothermal energy sources Source: Energy Information Administration, Geothermal Energy in the Western United States and Hawaii: Resources and Projected Electricity Generation Supplies, DOE/EIA-0544 (Washington, DC September 1991). http://www.eia.doe.gov/cneaf/solar.renewables/renewable.energy.annual/backgrnd/fig19.htm