Endurance Energy recently tested a novel approach to geothermal power generation by deploying it at an underwater volcano off the coast of Oregon. The startup drilled a well into a vent field nearly 5,000 feet below the surface, tapping into high temperatures. They then lowered a generator to the seabed to attempt electricity production from this heat. Although a power cable failure halted the full process, the generator briefly produced more power than it consumed when connected to a natural vent. This successful, albeit brief, demonstration serves as a key proof point for Endurance Energy's ambitious vision of creating a network of undersea geothermal power plants. The company aims to leverage the unique advantages of offshore locations, such as readily available water and high geothermal gradients. Founder Andrew Redd, a former SpaceX engineer, was inspired to tackle this complex engineering challenge with the potential for significant clean energy output. Endurance Energy, having raised substantial funding, has conducted multiple undersea deployments, with the Oregon test being their most comprehensive to date. While the technology's long-term viability remains to be seen, the company believes offshore geothermal offers a vast, untapped energy resource. Environmental impact is being closely monitored, with the company asserting it to be minimal. The theoretical potential of this technology, particularly around the Pacific's Ring of Fire, is immense, potentially exceeding current global energy demand. Endurance Energy is developing a modular, factory-producible system to achieve economies of scale, drawing parallels to solar panel manufacturing. Their immediate next step involves a commercial-size generator, with a planned project in Tonga aiming to begin operation next year.