GoKawiilEndurance Energy demonstrates subsea geothermal plant at Axial Seamount volcano
Seattle startup Endurance Energy tested a 3-ton prototype geothermal power plant nearly a mile underwater near the Axial Seamount volcano in September, generating under 10 seconds of net-positive electricity during a three-week deployment. The plant drilled two holes about 5,000 feet deep using a subsea lander launched from the ship Ocean Guardian, demonstrating the concept's technical feasibility rather than sustained power generation.
GoKawiil's interpretation of the reporting above, not reported fact.
The brief but successful test suggests underwater geothermal energy could eventually serve as an alternative power source for Pacific island nations currently reliant on costly imported fossil fuels, according to the company's stated goals. However, a Stanford energy expert cautions that while technically feasible, subsea geothermal is likely to be more expensive than land-based geothermal, meaning cost-effectiveness remains an open question before any commercial deployment.
- First-ever demonstration of a subsea geothermal power plant occurred near an active underwater volcano.
- The test produced less than 10 seconds of net-positive electricity, proving feasibility rather than practical output.
- Experts note deep-sea geothermal likely costs more than land-based systems, posing a hurdle to commercialization.
Source: arstechnica.com, 2026-10-19
Published there as: “Startup taps underwater volcano as energy source in "proof point" test”
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