Modeling Seismic Recordings of High-Frequency Guided Infrasound on Mars
- Université Paris Cité (France); Institut de Physique du Globe de Paris (IPGP) (France); Centre National de la Recherche Scientifique (CNRS), Paris (France)
- 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)
- Institut Supérieur de l’Aéronautique et de l’Espace (ISAE‐SUPAERO), Toulouse (France); University of Toulouse (France)
- 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)
- Univ. of Tokyo (Japan)
- 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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