🔬 Science Oct 19, 2026 · Jeremy Hsu

Startup taps underwater volcano as energy source in "proof point" test

Ars Technica Science
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Startup taps underwater volcano as energy source in "proof point" test
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The world’s first demonstration of a subsea geothermal power plant has taken place near an active underwater volcano almost a mile below the ocean surface. It generated less than 10 seconds of net-positive electricity but showed the technical feasibility of tapping another form of renewable energy underwater.
The three-week test deployment of the 3-ton prototype power plant took place at the Axial Seamount in the northeast Pacific Ocean in September. Endurance Energy, the Seattle-based startup b

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