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Discussion on seismically triggered avalanches on Mars after the s1222a Marsquake
  • +9
  • Antoine Lucas,
  • Ingrid J. Daubar,
  • Manon Le Teuff,
  • Clement Perrin,
  • Taichi Kawamura,
  • Liliya V Posiolova,
  • Philippe Lognonné,
  • Sebastien Rodriguez,
  • Domenico Giardini,
  • Grégory Sainton,
  • Anne Mangeney,
  • Alfred McEwen
Antoine Lucas

Corresponding Author:lucas@ipgp.fr

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Ingrid J. Daubar
Department of Earth, Environmental, and Planetary Sciences, Brown University
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Manon Le Teuff
Université Paris Sciences et Lettres
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Clement Perrin
Laboratoire de Planétologie et Géodynamique
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Taichi Kawamura
Université Paris Cité, Institut de physique du globe de Paris, CNRS
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Liliya V Posiolova
Malin Space Science Systems
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Philippe Lognonné
Université Paris Cité, Institute de physique de globe de Paris, CNRS
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Sebastien Rodriguez
Institut de Physique du Globe de Paris (IPGP), Université Paris-Diderot
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Domenico Giardini
ETH Zürich
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Grégory Sainton
Université paris Cité, Institut de physique du globe de Paris, CNRS
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Anne Mangeney
Institut de Physique du Globe de Paris
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Alfred McEwen
University of Arizona
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Potential dust avalanches as aftermaths of the seismic event of S1222a detected by the SEIS/InSight seismometer are investigated. Orbital observations emphasize that the area around the estimated location shows rather flat topography with North-South ridge structures. Thermal inertia data attests that the surface is essentially composed of granular materials, including dust. Thus, only a few locations show steep slopes with fragile soil. We investigated the orbital archive and requested targeted locations to assess the avalanche rate in the area and the influence of the M$_{W}^{Ma}$ 4.7, S1222a event. We find an increase in the avalanche rates when thermal inertia is low. We investigate the best location that could explain these avalanche rates from the aftermath ground deformation and discuss the implications in regards to the regional geology.
07 Mar 2023Submitted to ESS Open Archive
09 Mar 2023Published in ESS Open Archive