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Seismic scattering and absorption properties of Mars estimated through coda analysis on a long-period surface wave of S1222a marsquake
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  • Keisuke Onodera,
  • Takuto Maeda,
  • Kiwamu Nishida,
  • Taichi Kawamura,
  • Ludovic Margerin,
  • Sabrina Menina,
  • Philippe H. Lognonne,
  • William Bruce Banerdt
Keisuke Onodera
The University of Tokyo

Corresponding Author:onodera@eri.u-tokyo.ac.jp

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Takuto Maeda
Hirosaki University
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Kiwamu Nishida
Earthquake Research Institute, University of Tokyo
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Taichi Kawamura
Université Paris Cité, Institute de physique de globe de Paris, CNRS
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Ludovic Margerin
Paul Sabatier University - Toulouse III
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Sabrina Menina
Institut de Physique du Globe de Paris
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Philippe H. Lognonne
Institut De Physique Du Globe De Paris
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William Bruce Banerdt
Jet Propulsion Laboratory
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On May 4th 2022, the seismometer on Mars observed the largest marsquake (S1222a) during its operation. One of the most specific features of S1222a is the long event duration lasting more than 8 hours from the occurrence, in addition to the clear appearance of body and surface waves. As demonstrated on Earth, by modeling a long-lasting and scattered surface wave with the radiative transfer theory, we estimated the scattering and intrinsic quality factors of Mars (Qs and Qi). This study especially focused on the frequency range between 0.05 - 0.09 Hz, where Qs and Qi have not been constrained yet. Our results revealed that Qi = 1000 - 1500 and Qs = 30 - 500. By summarizing the Martian Qi and Qs estimated so far and by comparing them with those of other celestial bodies, we found that, overall, the Martian scattering and absorption properties showed Earth-like values.
20 Jan 2023Submitted to ESS Open Archive
20 Jan 2023Published in ESS Open Archive