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Estimation of the Seismic Moment Release Rate of Mars using InSight Seismic Data

Knapmeyer, Martin and Knapmeyer-Endrun, B. and Plesa, Ana-Catalina and Böse, M and Kawamura, T. and Clinton, John and Giardini, D. and Golombek, M. and Kedar, S. and Stähler, S. and Stevanovic, J. and Perrin, C. and Lognonne, P. and Teanby, N. and Weber, R. (2019) Estimation of the Seismic Moment Release Rate of Mars using InSight Seismic Data. 27th IUGG General assembly, 8.-18. Juli 2019, Montreal, Kanada.

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After the first few months of InSight seismic recordings on Mars, we provide an early estimation of the Martian annual seismic moment release rate. The non-detection of unambiguous events by the Viking seismic experiment constrained the annual moment release rate of Mars to within ten orders of magnitude. Evaluation of visible tectonic structures, as well as geodynamic modeling provide further constraints to narrow down this interval to little more than three orders of magnitude. Assuming that the moment-frequency distribution of Marsquakes follows a distribution similar to that found on Earth and Moon, implying that most of the seismic moment is released in the few largest events, it is possible to estimate the global moment release rate from a small number of events above the completeness threshold of the event catalog. We developed statistical estimators based on the tapered Gutenberg Richter distribution which allow computing estimates with as few as one such event. Evaluation of several real catalogs for Earth and Moon, as well as of 560 million synthetic catalogs worth 2.5 billion years of seismicity, shows the feasibility of the approach. We implemented a Monte Carlo method which evaluates our estimators for Marsquakes recorded by InSight, propagates the uncertainty of the individual event’s magnitudes and finally infers how likely any given combination of distribution parameters reproduces the moment rate estimation to within the observational uncertainty. The resulting probabilities can then be used to challenge existing moment rate models.

Item URL in elib:https://elib.dlr.de/130147/
Document Type:Conference or Workshop Item (Speech)
Title:Estimation of the Seismic Moment Release Rate of Mars using InSight Seismic Data
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Knapmeyer, MartinMartin.Knapmeyer (at) dlr.dehttps://orcid.org/0000-0003-0319-2514
Knapmeyer-Endrun, B.Seismological Observatory Bensberg, University of Cologne, Cologne, GermanyUNSPECIFIED
Plesa, Ana-CatalinaAna.Plesa (at) dlr.dehttps://orcid.org/0000-0003-3366-7621
Kawamura, T.Institut de Physique du Globe de Paris, Paris, FranceUNSPECIFIED
Clinton, JohnETH, Zurich, SwitzerlandUNSPECIFIED
Giardini, D.Institute of Geophysics/Swiss Seismological Service, Swiss Federal Institute of Technology, (ETHZ), Honggerberg, CH-3093 Zurich, SwitzerlandUNSPECIFIED
Golombek, M.jet propulsion laboratory, pasadena, ca, usaUNSPECIFIED
Kedar, S.jet propulsion laboratory, pasadena, ca, usaUNSPECIFIED
Stähler, S.ETH, SwitzerlandUNSPECIFIED
Perrin, C.Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Paris VII–Denis Diderot University, CNRS, Paris, FranceUNSPECIFIED
Lognonne, P.Institut de Physique du Globe de Paris, FranceUNSPECIFIED
Teanby, N.School of Earth Sciences, University of Bristol, Bristol, UKUNSPECIFIED
Weber, R.Marshall Space Flight CenterUNSPECIFIED
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Mars, InSight, Seismologie
Event Title:27th IUGG General assembly
Event Location:Montreal, Kanada
Event Type:international Conference
Event Dates:8.-18. Juli 2019
Organizer:International Union of Geodesy and Geophysics
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
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Physics
Deposited By: Knapmeyer, Dr. Martin
Deposited On:06 Nov 2019 08:28
Last Modified:06 Nov 2019 08:28

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