This week, physicists proposed that electricity could be produced by harnessing the energy of Earth’s rotation through its magnetic field, a concept that raises both eyebrows and interest.

This new discovery, discussed in Nature, is both compelling and contentious. The effect, detected in a specially designed apparatus, produced a mere 17 microvolts of electricity—less than a neuron’s activity during a single discharge. This minimal output challenges the verification process, as it’s difficult to confirm that the results are not influenced by another unidentified factor.

Should this phenomenon prove to be authentic and the technology be successfully scaled, it could lead to the development of a stationary, emission-free power source. This would be particularly beneficial in isolated environments or for certain medical devices. These findings were detailed in Physical Review Research and shared at an American Physical Society meeting in Anaheim, California.

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“The concept defies common sense and has been debated since the days of Faraday,” remarks Paul Thomas, a retired physicist from the University of Wisconsin–Eau Claire. He praises the precision of the experiments led by Christopher Chyba of Princeton University in New Jersey, describing them as “very convincing and extraordinary.”

While some experts find the results remarkable, skepticism persists. Rinke Wijngaarden, a retired physicist from the Free University of Amsterdam, has been tracking this research since 2016 but was unable to replicate the effect in his own experiments in 2018. He remains intrigued yet unconvinced by the theory proposed by Chyba and his team.

Harnessing Planetary Energy

Theoretically, the device mimics a traditional power station, where moving a conductor through a magnetic field induces electron movement, thereby generating electricity. With Earth’s rotation, if part of its magnetic field is considered static, a conductor situated on the planet would traverse different magnetic field components.

Typically, this would not result in electricity generation as the electrons would rearrange themselves against the magnetic force, neutralizing any potential charge movement. This principle does not hold in environments where the magnetic forces change continually, like in a generator.

However, Chyba’s team believes they’ve found an exception. Through complex calculations, they’ve shown that certain materials, when shaped into a cylindrical tube, can alter Earth’s magnetic field into an unusual pattern. This arrangement, they argue, could produce a magnetic force that isn’t counterbalanced by the internal electrostatic forces, thus generating a current.

To test their theory, the researchers constructed a cylindrical device from a soft magnetic material containing manganese, zinc, and iron. While controlling for other variables, they measured the voltage and current within the device. Their observations confirmed their hypothesis, revealing a slight voltage of 17-μV that varied with the device’s orientation to Earth’s magnetic field. No voltage was detected when they used a solid piece of the material instead of a hollow tube.

“The voltages observed are incredibly minimal, so numerous other factors could potentially explain them,” Wijngaarden points out, yet he acknowledges that Chyba’s group has meticulously attempted to eliminate these alternative explanations, such as temperature fluctuations.

Further Confirmation Required

More evidence is crucial to definitively attribute the observed voltage to Earth’s rotation, according to Wijngaarden. He suggests conducting experiments across different latitudes to see if the results vary as predicted, a challenging yet essential step given the unexpected findings.

Chyba believes that if other researchers can validate these results, the next objective would be to scale up the technology to produce a significant amount of energy. “Our calculations indicate how this might be achieved, but proving it’s feasible is another matter,” he explains.

Even if successful, this method won’t create energy out of nothing. It would utilize Earth’s kinetic energy, potentially slowing its rotation over time, though only slightly. If this technique were to meet all global electricity demands—approximately 11 trillion watts in 2022—the planet’s rotation would decelerate by about 7 milliseconds over the next century. This change is comparable to adjustments caused by natural phenomena like lunar gravitational pull or internal shifts within Earth’s core.

This article, originally published on March 19, 2025, is reproduced with permission.