This second link is mostly a definition of what geothermal is and does not contain any relevant information.
It mentions the geysers as a source of geothermal energy. Are you aware that the geysers did fail. The way they saved the geysers as a source of steam was by fracking water back into the earth. The geysers are in california which is suffering a decades long drought. California is suffering a lack of water, and now we must use what little water is in california to frack geothermal wells.
That second link, speaking of the geysers, proves my point. Geothermal is a weak, poor source of power.