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  • LiFei Tian1 and HuaJian Yao1. 2024: Response of InSight resonance modes to environmental factors on Mars. Earth and Planetary Physics. DOI: 10.26464/epp2024036
    Citation: LiFei Tian1 and HuaJian Yao1. 2024: Response of InSight resonance modes to environmental factors on Mars. Earth and Planetary Physics. DOI: 10.26464/epp2024036
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Response of InSight resonance modes to environmental factors on Mars

  • The InSight (Interior Exploration using Seismic Investigations, Geodesy, and Heat Transport) mission has recorded continuous ambient noise signals with many spectrum peaks since its landing in 2018. The majorities of these peaks are modes produced by instrumental vibrations and are associated with environmental factors such as temperature and wind energy fluctuations. Understanding how these modes react under various conditions is crucial since it aids in identifying their origins. In this study, we analyze the three-component spectra of InSight recordings from sols 184-738 and obtain the horizontal-to-vertical spectral ratio (HVSR, also known as H/V) curves for different time intervals. The primary modes, such as those at 3.3Hz and 4.1Hz, exhibit different behaviors, suggesting diverse origins. Some modes are sensitive to low temperature and some are sensitive to high temperature. Additionally, we investigate the influence of wind and temperature on the H/V curve. The peak frequency is mainly affected by temperature, while the H/V value is not associated with temperature or the wind only. Characterizing these modes and elucidating their origins are significant for processing signals from InSight and can provide valuable guidance for designing future planetary seismometers.
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