MIT Leads Geothermal Energy Boom That Could Power 15% of Growth

Imagine an energy source that's clean, runs 24/7, and exists almost everywhere beneath our feet. That's the promise scientists at MIT are now racing to unlock.

Geothermal energy has been around since the Romans heated their baths with it 2,000 years ago. But new drilling technology and fresh investment are finally making it possible to tap the Earth's heat at massive scale.

MIT researchers are leading the charge with innovations like millimeter-wave drilling, which can bore through superhot rock several kilometers underground. The technology, developed at MIT's Plasma Science and Fusion Center, is being commercialized by spinout company Quaise Energy to reach rocks hotter than 400 degrees Celsius.

The momentum is building fast. Over 40 MIT students packed a recent bootcamp on geothermal basics during January's Independent Activities Period. In March, MIT's Energy Initiative hosted back-to-back summits where leading geothermal companies shared their progress.

Countries are taking notice too. Kenya now gets more than 40% of its electricity from geothermal sources. Iceland powers nearly 30% of its electricity and 90% of its heating from Earth's heat. The U.S., Indonesia, New Zealand, and Turkey are all making geothermal expansion a national priority.

Even closer to home, Boston University's 19-story data center meets 90% of its heating and cooling needs using shallow geothermal systems. As data centers multiply across the country, many are signing power purchase agreements specifically for geothermal electricity.

The next frontier is "superhot rock" geothermal, which taps extreme temperatures deep underground to generate massive amounts of electricity from a single site for decades. Last month, Representatives Jake Auchincloss and Mark Amodei introduced bipartisan legislation to accelerate research and testing of this technology.

The Ripple Effect

What makes this moment different from past geothermal attempts is the perfect storm of advances converging at once. Drilling technology from the oil and gas industry is being adapted for deeper, hotter rocks. Private capital is flowing in as investors seek reliable clean energy. And climate policies are finally rewarding power sources that run continuously without emissions.

Carolyn Ruppel, deputy director of science and technology at MIT's Energy Initiative, says the university's corporate partners are increasingly asking about next-generation geothermal. "There is good momentum building across MIT," she notes, from the Earth Resources Laboratory to individual academic departments.

Unlike solar and wind, geothermal produces what the industry calls "firm power." It doesn't depend on weather or time of day. A geothermal plant generates the same clean electricity at midnight in winter as it does at noon in summer.

The International Energy Agency predicts that if project costs continue their current decline, geothermal could meet 15% of growth in global electricity demand between now and 2050. That's enough to power hundreds of millions of homes with energy that's been waiting beneath us all along.