Endurance Energy Tests Subsea Volcanic Power Generation

The Seattle firm successfully piloted an underwater geothermal plant 5,000 feet deep at the Axial Seamount.

Updated on Oct. 20, 2026 in Energy

Endurance Energy Tests Subsea Volcanic Power Generation

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Endurance Energy has achieved net-positive electricity generation during a test of its Adélie pilot plant at the Axial Seamount. The experimental system, located 300 miles off the Oregon coast, harnessed power from an active hydrothermal vent.

Why it matters

This demonstration highlights the potential for tapping into deep-sea geothermal energy to power future infrastructure. The successful test suggests a new pathway for clean energy generation in remote and extreme underwater environments.

The system reached a turbine speed of 26,000 revolutions per minute using geothermal fluids measuring 281°C. Engineers performed the test 5,000 feet below the surface at a 52-foot geothermal well.

The players

Endurance Energy

This Seattle-based company develops technology to harvest geothermal energy from deep-sea hydrothermal vents.

National Science Foundation

This federal agency funds scientific research and provided the Regional Cabled Array used for remote system operation.

The details

Engineers used the National Science Foundation's Regional Cabled Array to remotely operate the three-ton generator. While the system achieved net-positive power for 8.7 seconds, the deployment concluded early following an electrical protection system interruption and cable failure.

The Adélie pilot plant underwent a three-week deployment.
Endurance Energy announced the test results in October 2026.

The Big Picture

This test extends the utility of the National Science Foundation's Regional Cabled Array by demonstrating its viability for remote industrial power management beyond standard oceanographic research.

The successful generation of electricity from hydrothermal vents could eventually lead to new, reliable energy sources for coastal grids and industrial data centers. This technology offers a potential future solution for supplying power to facilities that currently depend on land-based infrastructure.

The takeaway

This test proves that extracting power from extreme underwater environments is technologically possible. Future developments will focus on improving cable reliability and scaling the system to meet industrial energy demands.