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Title: Modeling Seismic Recordings of High-Frequency Guided Infrasound on Mars

Journal Article · · Journal of Geophysical Research. Planets
ORCiD logo [1];  [2]; ORCiD logo [3]; ORCiD logo [4];  [5];  [1]; ORCiD logo [1]; ORCiD logo [6]
  1. Université Paris Cité (France); Institut de Physique du Globe de Paris (IPGP) (France); Centre National de la Recherche Scientifique (CNRS), Paris (France)
  2. Université Paris Cité (France); Institut de Physique du Globe de Paris (IPGP) (France); Centre National de la Recherche Scientifique (CNRS), Paris (France); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
  3. Institut Supérieur de l’Aéronautique et de l’Espace (ISAE‐SUPAERO), Toulouse (France); University of Toulouse (France)
  4. Nantes Université (France); Université Angers, Nantes (France); Le Mans Université, Nantes (France); Centre National de la Recherche Scientifique (CNRS), Nantes (France). Laboratoire de Planétologie et Géosciences (LPG), Observatoire des Sciences de l'Univers Nantes Atlantique (Osuna); Université Gustave Eiffel, Nantes (France); Conservatoire National des Arts et Métiers (CNAM), Nantes (France)
  5. Univ. of Tokyo (Japan)
  6. California Institute of Technology (CalTech), Pasadena, CA (United States). Jet Propulsion Laboratory (JPL)

NASA's Interior Exploration using Seismic Investigations, Geodesy and Heat Transport (InSight) mission records several high-frequency (>0.5 Hz) dispersive seismic signals on Mars. These signals are due to the acoustic-to-seismic coupling of infrasound generated by the entry and impact of meteorites. This dispersion property is due to infrasound propagating in a structured atmosphere, and we refer to this dispersive infrasound as guided infrasound. We propose to model the propagation of guided infrasound and the seismic coupling to the ground analytically; we use a 1D layered atmosphere on a three-layer solid subsurface medium. The synthetic ground movements fit the observed dispersive seismic signals well and the fitting indicates that the regolith beneath InSight is about 40-m in thickness. We also examine and validate the previously-published subsurface models derived from InSight ambient seismic vibration data.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
National Research Agency (ANR); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
2507002
Report Number(s):
LA-UR--22-25146
Journal Information:
Journal of Geophysical Research. Planets, Journal Name: Journal of Geophysical Research. Planets Journal Issue: 11 Vol. 127; ISSN 2169-9097
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English

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  • Chakravarthy, G. Vijaya Raghavendra; Michaels, Paul
  • Symposium on the Application of Geophysics to Engineering and Environmental Problems 2008 https://doi.org/10.4133/1.2963230
conference January 2008