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Constraining Martian Regolith and Vortex Parameters From Combined Seismic and Meteorological Measurements

Murdoch, Naomi and Spiga, Aymeric and Lorenz, R. and Garcia, Raphaël F. and Perrin, C. and Widmer‐Schnidrig, R. and Rodriguez, S. and Compaire, Nicolas and Warner, N. H. and Mimoun, David and Banfield, D. and Lognonné, Philippe and Banerdt, William Bruce Constraining Martian Regolith and Vortex Parameters From Combined Seismic and Meteorological Measurements. (2021) Journal of Geophysical Research: Planets, 126 (2). ISSN 2169-9097

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Official URL: https://doi.org/10.1029/2020JE006410


The InSight mission landed on Mars in November 2018 and has since observed multiple convective vortices with both the high performance barometer and the low-noise seismometer SEIS that has unprecedented sensitivity. Here, we present a new method that uses the simultaneous pressure and seismic measurements of convective vortices to place constraints on the elastic properties of the Martian subsurface and the Martian vortex properties, while also allowing a reconstruction of the convective vortex trajectories. From data filtered in the (0.02–0.3 Hz) frequency band, we estimate that the mean value of η (η = E/[1 − ν2], where E is the Young's modulus and ν is the Poisson's ratio) of the Martian ground in the region around SEIS is 239 ± 140 MPa. In addition, we suggest that the previously reported paucity of vortex seismic observations to the west of InSight may be due to the fact that the ground is harder to the west than to the east, consistent with geomorphological surface interpretations.

Item Type:Article
HAL Id:hal-03178955
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Cornell University (USA)
Other partners > Institut de Physique du Globe de Paris - IPGP (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Other partners > Institut universitaire de France - IUF (FRANCE)
Other partners > Karlsruhe Institute of Technology - KIT (GERMANY)
Other partners > Université Paris Sciences & Lettres - PSL (FRANCE)
Other partners > Universität Karlsruhe (GERMANY)
Other partners > Universität Stuttgart (GERMANY)
Other partners > Johns Hopkins Applied Physics Laboratory - APL (USA)
Other partners > California Institute of Technology - Caltech (USA)
Other partners > Ecole Normale Supérieure de Paris - ENS Paris (FRANCE)
Other partners > State University of New York - SUNY (USA)
Laboratory name:
Deposited On:24 Mar 2021 09:04

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