Scientists First Ever Recorded the Sound of Electric Sparks in the Atmosphere of Mars
The results of this groundbreaking discovery were published in the prestigious journal Nature.
The SuperCam microphone, originally designed to record wind sounds, rover movements, and laser pulses on rocks, unexpectedly found itself at the epicenter of two powerful Martian dust devils.
During these events, scientists from Toulouse and Paris noticed unusual acoustic and electromagnetic pulses in the recordings.
After detailed analysis, the team confirmed that these were genuine miniature electrical discharges—similar to the weak static electricity people feel on Earth when touching a metal doorknob in dry weather.
Why Sparks Appear So Easily on Mars
When tiny particles of Martian dust rub against each other within a dust vortex, they become charged with electricity through the triboelectric effect.
The Martian atmosphere is extremely thin—approximately 100 times less dense than Earth’s—so the voltage required to create a spark is significantly lower.
As a result, the accumulated charges discharge in the form of tiny sparks a few centimeters long. Each spark generates a weak shock wave—a barely audible “pop”—that was perfectly captured by SuperCam’s sensitive microphone.
This is the first direct evidence of natural static discharges on Mars. Previously, such processes were only predicted through computer modeling.
This discovery highlights the enormous potential of planetary acoustics: microphones can detect phenomena invisible to cameras, from wind turbulence to hidden electrical processes within dust storms.
This discovery not only deepens our understanding of the Martian atmosphere, but also has practical implications: strong electrical discharges in global dust storms could pose a real danger to future manned missions and equipment on the Red Planet.
