Geothermal energy is thermal energy generated and stored in the Earth. The Earth’s interior produces a huge amount of heat that is constantly traveling from the depths in the Earth’s surface. Most of the heat is transferred by convection.

Geothermal energy is made up of three components:

• the energy flow through the Earth’s crust in the form of mass transport (by magma, water, steam, gases);
• the flow of heat by conduction;
• Energy, which is stored in rocks and fluids in the Earth’s crust.

The theoretical potential of geothermal energy in Slovenia amounted to 5,467 GWh per year. The actual potential is much lower and disproportionately distributed across the country. The largest discovered potential for the exploitation of geothermal energy in the Pomurje region in the so-called Pannonian Basin.