If you're unclear on what Enhanced Geothermal Systems (EGS) are about, read this snipped from theGoogle.org EGS page:
Enhanced Geothermal Systems, or EGS, attempts to do just that. EGS produces heat and electricity by harnessing the energy from hot rock deep below the earth's surface, expanding the potential of traditional geothermal energy by orders of magnitude. EGS is a big challenge, but with the potential to power the world many times over, it demands our immediate attention. At Google we support efforts to advance EGS through R&D, investment, policy and information.To see this data for yourself in Google Earth, simply load this KMZ file
http://www.google.org/egs/downloads/EGSPotential.kmz
Down Load this kmz file in Google earth and