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Different Martian Crustal Seismic Velocities Across the Dichotomy Boundary From Multi‐Orbiting Surface Waves

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  • معلومة اضافية
    • Contributors:
      University of California Los Angeles (UCLA); University of California (UC); Institut de Physique du Globe de Paris (IPGP (UMR_7154)); Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité); Stony Brook University SUNY (SBU); State University of New York (SUNY); Joseph Louis LAGRANGE (LAGRANGE); Université Nice Sophia Antipolis (1965 - 2019) (UNS); COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS); Jet Propulsion Laboratory (JPL); NASA-California Institute of Technology (CALTECH); University of Cologne; ANR-19-CE31-0008,MAGIS,MArs Geophysical InSight(2019)
    • بيانات النشر:
      HAL CCSD
      American Geophysical Union
    • الموضوع:
      2023
    • Collection:
      HAL Université Côte d'Azur
    • نبذة مختصرة :
      International audience ; We have observed both minor-arc (R1) and major-arc (R2) Rayleigh waves for the largest marsquake (magnitude of 4.7 ± 0.2) ever recorded. Along the R1 path (in the lowlands), inversion results show that a simple, two-layer model with an interface located at 21–29 km and an upper crustal shear-wave velocity of 3.05–3.17 km/s can fit the group velocity measurements. Along the R2 path, observations can be explained by upper crustal thickness models constrained from gravity data and upper crustal shear-wave velocities of 2.61–3.27 and 3.28–3.52 km/s in the lowlands and highlands, respectively. The shear-wave velocity being faster in the highlands than in the lowlands indicates the possible existence of sedimentary rocks, and relatively higher porosity in the lowlands.
    • Relation:
      hal-03938829; https://u-paris.hal.science/hal-03938829; https://u-paris.hal.science/hal-03938829v1/document; https://u-paris.hal.science/hal-03938829v1/file/JL_GRL_TrackChanges_R1.pdf
    • الرقم المعرف:
      10.1029/2022GL101243
    • Rights:
      info:eu-repo/semantics/OpenAccess
    • الرقم المعرف:
      edsbas.8CE3E92B