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<p>Transient electromagnetic disturbances induced by magnetospheric or ionospheric currents are detectable on the Martian surface. Here we present dayside ultra-low frequency magnetic disturbances observed by the RoMAG instrument aboard the Zhurong rover in southern Utopia Planitia. The data were acquired during the first 3&#xa0;months of the mission, between ~ 10:00 and ~ 14:00 local time. We analyze disturbances with periods of ~ 5–128&#xa0;s, as constrained by instrumental and selection criteria. Statistically, events in the frequency range ~ 0.05–0.20&#xa0;Hz dominate in occurrence, with a declining trend toward higher frequencies. This spectral character closely resembles disturbance patterns detected by the MAVEN orbiter at low altitudes. The magnetic disturbances are frequent but with small amplitudes. The median peak-to-peak amplitude of the disturbances is quantified to be ~ 0.6 nT, significantly attenuated compared to MAVEN’s orbital measurements (~ 6.3 nT) acquired during overflights of the landing site. These magnetic disturbances suggest diverse ionospheric current dynamics and may reflect possible differences in the inductive properties of crustal materials between the Zhurong and InSight sites.</p> Graphical Abstract <p></p>

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Ultra-low frequency magnetic disturbances on the dayside Martian surface detected by the Zhurong rover

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月7日

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  • Lican Shan,
  • Ziyong Liu,
  • Lei Wang,
  • Kuixiang Zhang,
  • Hao Luo,
  • Ying Zhang,
  • Yasong Ge,
  • Aimin Du

摘要

Transient electromagnetic disturbances induced by magnetospheric or ionospheric currents are detectable on the Martian surface. Here we present dayside ultra-low frequency magnetic disturbances observed by the RoMAG instrument aboard the Zhurong rover in southern Utopia Planitia. The data were acquired during the first 3 months of the mission, between ~ 10:00 and ~ 14:00 local time. We analyze disturbances with periods of ~ 5–128 s, as constrained by instrumental and selection criteria. Statistically, events in the frequency range ~ 0.05–0.20 Hz dominate in occurrence, with a declining trend toward higher frequencies. This spectral character closely resembles disturbance patterns detected by the MAVEN orbiter at low altitudes. The magnetic disturbances are frequent but with small amplitudes. The median peak-to-peak amplitude of the disturbances is quantified to be ~ 0.6 nT, significantly attenuated compared to MAVEN’s orbital measurements (~ 6.3 nT) acquired during overflights of the landing site. These magnetic disturbances suggest diverse ionospheric current dynamics and may reflect possible differences in the inductive properties of crustal materials between the Zhurong and InSight sites.

Graphical Abstract