Green Therma deploys demonstration of closed-loop geothermal in Groß Schönebeck, Germany Green Therma has deployed its closed-loop geothermal demonstration at the Groß Schönebeck research site in Germany, and the project is now moving from installation into operation. The system is intended to test the company’s Heat4Ever/DualVac concept under real geothermal conditions at depths of more than 3 kilometers. Green Therma deploys closed-loop geothermal demonstration in Groß Schönebeck, Germany Green Therma has reached an important milestone in the development of closed-loop geothermal technology with the deployment of its demonstration project at the Groß Schönebeck research site in Germany. The company says the system is now circulating water through a single-well closed-loop configuration, bringing geothermal heat to the surface from more than 3 kilometers underground. The project is being carried out at the GFZ Helmholtz Centre for Geosciences’ geothermal research facility,...
“Mazama Energy Unveils the World’s Hottest Geothermal System — A Blueprint for Terawatt-Scale Clean Energy”
Mazama Energy Ignites a New Era: The World’s Hottest Geothermal System Powers Toward a Carbon-Free Future By Robert Buluma , October 2025 In a quiet corner of Oregon’s Cascade Range, deep beneath the rugged volcanic landscape of Newberry, a new energy revolution is taking shape. Mazama Energy — a startup incubated by Khosla Ventures and backed by Gates Frontier — has just achieved a technological milestone that could change the way we power the planet. At a staggering 629 °F (331 °C), Mazama’s newly completed Enhanced Geothermal System (EGS) is now the hottest ever recorded on Earth. And this is just the beginning. By 2026, the company expects to push those temperatures to 750 °F (400 °C) — unlocking enough energy to power gigawatts of clean electricity from this single site. 🔥 Cracking the Code of the Earth’s Heat For decades, geothermal energy has been the “quiet cousin” of renewables — clean, reliable, but limited to places where hot water naturally flows near the sur...