How did Perseverance detect Mars atmospheric electrical discharges?

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Perseverance Detected Mars Atmospheric Electrical Discharges Using Audio and Electromagnetic Recordings

Nasa's Perseverance rover has detected electrical discharges in the Martian atmosphere, providing the first documented evidence of atmospheric electrical activity on the Red Planet. These discharges were identified through audio and electromagnetic recordings captured by the rover's SuperCam instrument during its exploration of Jezero Crater since 2021.
SuperCam's Dual Recording Capabilities

The SuperCam instrument, a sophisticated remote-sensing tool aboard the Perseverance rover, was instrumental in this discovery. It is equipped to capture both audio data and electromagnetic signals. By analysing 28 hours of microphone recordings, researchers identified 55 distinct electrical discharges, with 16 occurring during close proximity to Martian dust devils.
Association with Dust Devils and Triboelectricity

These detected electrical discharges are frequently linked to whirlwinds known as dust devils. The underlying cause is a phenomenon called triboelectricity, which arises from the friction between tiny dust grains suspended in the Martian air. This friction leads to the buildup and subsequent release of electrons in the form of electrical arcs.
Characteristics of the Detected Discharges

The electrical sparks detected by Perseverance are quite small, measuring only a few millimeters in length. Their audible signature is described as a distinct spark or whip-crack sound. The energy released by these discharges is comparable to that of an automobile ignition system, indicating a significant, albeit localized, electrical event.

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How did Perseverance detect Mars atmospheric electrical discharges?

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