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Present-day Mars' Seismicity Predicted from 3-D Thermal Evolution Models of Interior Dynamics

Plesa, Ana-Catalina and Knapmeyer, Martin and Golombek, M. and Breuer, Doris and Grott, Matthias and Kawamura, T. and Lognonne, P. and Tosi, Nicola and Weber, R. (2018) Present-day Mars' Seismicity Predicted from 3-D Thermal Evolution Models of Interior Dynamics. Geophysical Research Letters, 45, pp. 2580-2589. Wiley. DOI: 10.1002/2017GL076124 ISSN 0094-8276

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Official URL: https://agupubs.onlinelibrary.wiley.com/doi/10.1002/2017GL076124

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.

Item URL in elib:https://elib.dlr.de/116642/
Document Type:Article
Title:Present-day Mars' Seismicity Predicted from 3-D Thermal Evolution Models of Interior Dynamics
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Plesa, Ana-CatalinaAna.Plesa (at) dlr.dehttps://orcid.org/0000-0003-3366-7621
Knapmeyer, MartinMartin.Knapmeyer (at) dlr.dehttps://orcid.org/0000-0003-0319-2514
Golombek, M.jet propulsion laboratory, pasadena, ca, usahttps://orcid.org/0000-0002-1928-2293
Breuer, DorisDoris.Breuer (at) dlr.dehttps://orcid.org/0000-0001-9019-5304
Grott, MatthiasMatthias.Grott (at) dlr.dehttps://orcid.org/0000-0002-8613-7096
Kawamura, T.institut de physique du globe de paris, paris, francehttps://orcid.org/0000-0001-5246-5561
Lognonne, P.institut de physique du globe, paris, francehttps://orcid.org/0000-0002-1014-920X
Tosi, Nicolanicola.tosi (at) dlr.dehttps://orcid.org/0000-0002-4912-2848
Weber, R.NASA Marshall Space Flight Center, Huntsville, AL, USAUNSPECIFIED
Date:2018
Journal or Publication Title:Geophysical Research Letters
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:45
DOI :10.1002/2017GL076124
Page Range:pp. 2580-2589
Publisher:Wiley
ISSN:0094-8276
Status:Published
Keywords:Mars, Seismicity, Thermal evolution, Interior Dynamics, InSight
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):Project InSight HP3, R - Vorhaben Exploration des Sonnensystems
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Physics
Deposited By: Plesa, Dr. Ana-Catalina
Deposited On:18 Dec 2018 09:43
Last Modified:18 Dec 2018 09:43

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