 The Geothermal Energy Association (GEA) has estimated that only 6.9 percent of the global's total potential has been captured so far.The IPCC reported that geothermal power had the potential to be in the range of 35 GW to 2 TW globally.Countries generating more than 15 percent of their electricity from geothermal sources include El Salvador, Kenya, the Philippines, Iceland, New Zealand, and Costa Rica.