A bolt of lightning on Earth can superheat the air around it to 30,000 Kelvin and unleash a burst of radio energy detectable hundreds of miles away. On Jupiter, the same basic process appears to operate on a staggeringly larger scale. Data published in AGU Advances in June 2026 shows that lightning inside Jupiter’s atmosphere can produce radio pulses with peak power up to roughly 100 times greater than the strongest comparable signals from terrestrial storms, giving scientists their first detailed power census of electrical activity on another planet.
The measurements come from NASA’s Juno spacecraft, which has been orbiting Jupiter since 2016 and carries a Microwave Radiometer (MWR) with a dedicated 600 MHz channel built specifically to detect lightning deep below the gas giant’s cloud tops. During close passes over Jupiter’s North Equatorial Belt in 2021 and 2022, the MWR recorded hundreds of short-duration radio bursts originating from a type of storm the research team calls “stealth superstorms,” massive convective systems that lack the bright, visible cloud plumes of Jupiter’s more famous outbursts but still churn with intense electrical activity hidden beneath layers of ammonia ice and hydrogen gas.
How scientists measured lightning from 4,000 miles up
Detecting lightning on a planet with no solid surface and an atmosphere roughly 11 times wider than Earth’s requires a specific kind of instrument. The MWR’s 600 MHz channel was chosen because radio waves at that frequency can punch through Jupiter’s thick upper clouds, reaching depths where water-based thunderstorms are thought to form. When a lightning discharge fires, it produces a brief spike of radio energy that the MWR captures as the spacecraft sweeps overhead at roughly 130,000 miles per hour during its closest approach.
To compare Jovian strikes with terrestrial ones, the research team calculated the effective isotropic radiated power (EIRP) of each detected pulse, a standard measure that estimates how powerful the source would appear if it radiated equally in all directions. By accounting for Juno’s distance from each storm, the spacecraft’s viewing angle, and the MWR’s calibrated sensitivity, the researchers built a statistical distribution of pulse powers and stacked it against equivalent measurements of Earth lightning at similar frequencies.
The result: Jupiter’s strongest detected pulses reached EIRP values roughly two orders of magnitude above the upper range recorded for terrestrial lightning at 600 MHz. “We were expecting Jupiter’s lightning to be powerful, but seeing pulses that consistently topped anything in the terrestrial record by such a wide margin was striking,” said Ivana Kolmasova, a co-author on the AGU Advances study and a researcher at the Czech Academy of Sciences’ Institute of Atmospheric Physics. The full dataset, archived in a publicly accessible Dryad repository, includes the timing, geometry, and noise characteristics for each pulse, allowing independent teams to verify the calculations.
Building on a decade of Juno discoveries
The new power analysis did not emerge in a vacuum. Juno’s earliest lightning results, published in Nature in 2018, confirmed that the spacecraft was picking up widespread 600 MHz radio signatures near Jupiter’s poles, signals consistent with lightning rather than other atmospheric noise. That finding overturned a long-standing puzzle: NASA’s earlier Voyager and Galileo missions had detected lightning only at lower frequencies, leading some researchers to wonder whether Jovian discharges operated on fundamentally different physics than Earth’s. Juno showed they did not.
A follow-up study in Geophysical Research Letters strengthened the case by matching MWR radio pulses with whistler waves picked up by Juno’s separate Waves instrument. Whistlers are low-frequency electromagnetic signals that travel along magnetic field lines after a lightning strike, and finding them in sync with the MWR detections provided independent confirmation that the radio bursts were genuine lightning, not instrument artifacts.
Together, those earlier studies established the detection chain that the 2026 analysis relies on: the MWR works as designed, the signals it records are real lightning, and the underlying discharge process resembles what happens inside Earth’s thunderclouds, even if the energy involved is far greater.
What the stealth superstorms reveal
One of the more intriguing aspects of the new findings is where the lightning was detected. Jupiter’s most visually dramatic storms tend to erupt at higher latitudes and produce towering white plumes visible in amateur telescopes. The stealth superstorms of 2021 and 2022, by contrast, lurked in the North Equatorial Belt, a region closer to the equator, and showed little obvious disturbance in visible-light images. Only in the microwave band did their ferocity become apparent.
That raises a question scientists are still working to answer: do the extreme power levels seen in these stealth storms represent typical Jovian lightning, or are they outliers? The 2018 Nature study focused on polar lightning, while the new work targets a different latitude band entirely. If stealth superstorms are unusually efficient at generating high-frequency radio bursts, then the “up to 100 times” figure may describe the upper tail of Jupiter’s lightning power distribution rather than its average. More Juno orbits and broader geographic sampling will be needed to settle the question.
Modeling assumptions also introduce uncertainty. Converting a measured radio signal at the spacecraft into an intrinsic power at the source requires accounting for how the pulse propagated through Jupiter’s atmosphere, the shape of the emission beam, and the instrument’s response function. The AGU Advances team applied a consistent methodology across all detections, but the uncertainty margins on the most energetic individual events are significant, and small shifts in atmospheric modeling could nudge specific pulses up or down in inferred power.
Implications for detecting storms on distant worlds
For planetary scientists, the practical implications extend well past the solar system’s largest planet. If gas-giant lightning routinely launches radio pulses far more powerful than Earth’s at comparable frequencies, then electrical storms on distant worlds may be detectable across greater distances and through thicker cloud decks than models previously assumed. That possibility is directly relevant to the growing field of exoplanet atmospheric characterization, where researchers are searching for ways to probe weather on worlds too far away to image directly.
Brown dwarfs, failed stars with atmospheres that share some chemical similarities with Jupiter’s, are another target. Radio telescopes have already picked up sporadic emissions from some brown dwarfs that could be lightning-related, and having a calibrated power distribution from Jupiter gives those observations a concrete reference point.
Back at Jupiter, the Juno mission continues to collect data during its extended mission phase, with additional close passes over storm-active regions planned into 2026. Each orbit adds to the statistical sample and offers the chance to catch lightning in different storm types, latitudes, and seasons of Jupiter’s 12-year orbital cycle. The publicly archived Dryad dataset means that as new detections arrive, independent groups can fold them into the existing power distribution and test whether the extreme upper end holds steady or shifts.
What is already clear is that Jupiter’s electrical storms operate on a scale that dwarfs anything on Earth. The planet’s atmosphere, hundreds of miles deep and driven by internal heat as much as by sunlight, creates convective engines that terrestrial meteorology has no analog for. The lightning those engines produce is not just frequent; pulse for pulse, it is among the most powerful natural radio sources in the solar system.
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*This article was researched with the help of AI, with human editors creating the final content.
