Solid/atmosphere Moment Partitioning in Hypervelocity Impacts on Mars From Seis Recorded Seismic and Acoustic Signals and High Resolution Crater Imaging.
Description:
The SEIS VBB sensor detected 10 confirmed impacts on Mars, documented by both the seismic signal and the high-resolution imaging of the formed crater. For about half of them, a chirp in the seismic signal was also detected, which was generated by the ground shaking generated by infrasounds generated by the impact. At several detected impact sites, high resolution images show the imprint of the blast with a notable occurrence on Sol 1094, dated 12/24/2021, marking the largest impact detected by the InSight mission.
The seismic source is constrained by the amplitude of seismic body waves, or surface waves for S1094b, and the imaged crater diameter. The acoustic source is constrained by the amplitude of indirect infrasounds and the imaged diameter of the blast zone. This allows two different estimations of these two sources: the first is the one acting on the ground, therefore associated with the seismic source while the second is acting just above the surface therefore associated with the acoustic source, each being expressed by seismic or acoustic moment, respectively. Comparing the seismic and acoustic moments for those confirmed impacts will provide the first estimation of the energy partitioning between ground and air for high velocity impacts on Mars, characterized by speeds and energies furthermore never recorded on Earth.
We present here preliminary results of this analysis made with different seismic and hydrocode modeling and discuss the impact of seismic scattering, lateral variations, subsurface structure and atmospheric attenuation in our estimations of the seismic and acoustic moments and associated energy/moment partitioning.
Session: Advancements in Forensic Seismology and Explosion Monitoring - IV
Type: Oral
Date: 5/2/2024
Presentation Time: 04:45 PM (local time)
Presenting Author: Philippe
Student Presenter: No
Invited Presentation:
Authors
Philippe Lognonné Presenting Author Corresponding Author lognonne@ipgp.fr Université Paris Cité |
Carys Bill c.bill23@imperial.ac.uk Imperial College |
Gareth Collins g.collins@imperial.ac.uk Imperial College |
Ingrid Daubar ingrid_daubar@brown.edu Brown University |
Doyeon Kim doyeon.kim@imperial.ac.uk Imperial College |
Ben Fernando bfernan9@jh.edu Johns Hopkins University |
Marouchka Froment mfroment@ipgp.fr Université Paris Cité |
Raphael Garcia raphael.garcia@isae-supaero.fr Institut Supérieure de l'Aéronautique et de l'Espace |
Taichi Kawamura kawamura@ipgp.fr Université Paris Cité |
Carène Larmat carene@lanl.gov Los Alamos National Laboratory, Los Alamos, New Mexico, United States |
Mark P Panning mark.p.panning@jpl.nasa.gov Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, United States |
Liliya Posioleva posiolov@msss.com Malin Space Science Systems, San Diego, California, United States |
Katarina Miljkovic katarina.miljkovic@curtin.edu.au University of Curtin, Curtin, , Australia |
Esteban Rougier erougier@lanl.gov Los Alamos National Laboratory, Los Alamos, New Mexico, United States |
Zongbo Xu zongboxu@ipgp.fr Université Paris Cité, Paris, , France |
Zhou Lei zlei@lanl.gov Los Alamos National Laboratory, Los Alamos, New Mexico, United States |
Solid/atmosphere Moment Partitioning in Hypervelocity Impacts on Mars From Seis Recorded Seismic and Acoustic Signals and High Resolution Crater Imaging.
Category
Advancements in Forensic Seismology and Explosion Monitoring