Geothermicly generation utilizes heat from within the earth as a renewable energy source for electricity production and direct use applications. The core of the earth is extremely hot, around 4000–7000°C. This heat travels towards the outer layers of the earth including the crust which consists of hot rocks and water. https://medium.com/@rokadevaishnavi51/geothermal-power-unleashing-the-potential-of-tidal-energy-an-underappreciated-renewable-power-c8f1cd5e2d27