Present-Day Mars' Seismicity Predicted From 3-D Thermal Evolution Models of Interior Dynamics - Archive ouverte HAL Access content directly
Journal Articles Geophysical Research Letters Year : 2018

Present-Day Mars' Seismicity Predicted From 3-D Thermal Evolution Models of Interior Dynamics

A.-C. Plesa
  • Function : Author
M. Knapmeyer
M. Golombek
D. Breuer
M. Grott
T. Kawamura
P. Lognonné
N. Tosi
R. C Weber
  • Function : Author

Abstract

The Interior Exploration using Seismic Investigations, Geodesy and Heat Transport mission, to be launched in 2018, will perform a comprehensive geophysical investigation of Mars in situ. The Seismic Experiment for Interior Structure package aims to detect global and regional seismic events and in turn offer constraints on core size, crustal thickness, and core, mantle, and crustal composition. In this study, we estimate the present-day amount and distribution of seismicity using 3-D numerical thermal evolution models of Mars, taking into account contributions from convective stresses as well as from stresses associated with cooling and planetary contraction. Defining the seismogenic lithosphere by an isotherm and assuming two end-member cases of 573 K and the 1073 K, we determine the seismogenic lithosphere thickness. Assuming a seismic efficiency between 0.025 and 1, this thickness is used to estimate the total annual seismic moment budget, and our models show values between 5.7 × 10 16 and 3.9 × 10 19 Nm.

Domains

Planetology
Fichier principal
Vignette du fichier
Plesa et al. 2018.pdf (1.26 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive
Loading...

Dates and versions

hal-02105479 , version 1 (21-04-2019)

Identifiers

Cite

A.-C. Plesa, M. Knapmeyer, M. Golombek, D. Breuer, M. Grott, et al.. Present-Day Mars' Seismicity Predicted From 3-D Thermal Evolution Models of Interior Dynamics. Geophysical Research Letters, 2018, 45 (6), pp.2580-2589. ⟨10.1002/2017GL076124⟩. ⟨hal-02105479⟩
97 View
96 Download

Altmetric

Share

Gmail Facebook X LinkedIn More