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Updated: Mar 1, 2026

Method for Recording Broadband High Resolution Emission Spectra of Laboratory Lightning Arcs
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Lightning-generated waves detected at Mars.

František Němec1, Kateřina Rosická1,2, Ivana Kolmašová1,2

  • 1Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic.

Science Advances
|February 27, 2026
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Summary
This summary is machine-generated.

Scientists detected lightning-generated electromagnetic waves in Mars's ionosphere using the MAVEN spacecraft. This provides evidence for electrical discharges, or lightning, occurring in the Martian atmosphere.

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Area of Science:

  • Planetary Science
  • Atmospheric Physics
  • Electromagnetism

Background:

  • Lightning is confirmed on Jupiter, Saturn, and Neptune via electromagnetic waves.
  • The presence of lightning on Venus and Mars is currently unconfirmed.
  • Understanding planetary lightning provides insights into atmospheric dynamics and electrical processes.

Purpose of the Study:

  • To investigate the potential occurrence of lightning on Mars.
  • To analyze electromagnetic wave signals detected in the Martian ionosphere.
  • To provide direct evidence for or against electrical discharges on Mars.

Main Methods:

  • Utilized data from NASA's MAVEN spacecraft.
  • Detected and analyzed a frequency-dispersed whistler signal in the Martian ionosphere.
  • Modeled wave propagation from the Martian atmosphere to the spacecraft.
  • Incorporated realistic crustal magnetic field and ionospheric models for analysis.

Main Results:

  • Observed a frequency-dispersed whistler signal, indicative of lightning-generated electromagnetic waves.
  • Demonstrated the plausibility of wave propagation from the Martian atmosphere to the MAVEN spacecraft.
  • Showed that the observed signal dispersion aligns with theoretical expectations based on Martian models.
  • Attribution of the signal to an impulsive source in the Martian atmosphere.

Conclusions:

  • The detected whistler provides direct evidence for electromagnetic waves originating from an impulsive source on Mars.
  • These findings strongly suggest that electrical discharges, akin to lightning, may occur in the Martian atmosphere.
  • This discovery opens new avenues for studying atmospheric electricity on other planets.