Menina, Sabrina, Margerin, Ludovic, Kawamura, Taichi ORCID: 0000-0001-5246-5561, Lognonne, Philippe ORCID: 0000-0002-1014-920X, Marti, Jules, Drilleau, Melanie ORCID: 0000-0001-5625-9706, Calvet, Marie ORCID: 0000-0001-9660-5079, Compaire, Nicolas, Garcia, Raphael, Karakostas, Foivos ORCID: 0000-0001-5751-5900, Schmerr, Nicholas, van Driel, Martin, Staehler, Simon C., Plasman, Matthieu, Giardini, Domenico, Carrasco, Sebastian, Knapmeyer-Endrun, Brigitte, Sainton, Gregory and Banerdt, William B. (2021). Energy Envelope and Attenuation Characteristics of High-Frequency (HF) and Very-High-Frequency (VF) Martian Events. Bull. Seismol. Soc. Amer., 111 (6). S. 3016 - 3035. ALBANY: SEISMOLOGICAL SOC AMER. ISSN 1943-3573

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Abstract

Since its deployment at the surface of Mars, the Seismic Experiment for Interior Structure (SEIS) instrument of the InSight mission has detected hundreds of small-magnitude seismic events. In this work, we highlight some features of two specific families: high-frequency (HF) and very-high-frequency (VF) events. We characterize the shape of the energy envelopes of HF and VF events with two parameters: (1) the delay time td between the onset and the peak of the dominant arrival; and (2) the quality factor Qc, which quantifies the energy decay rate in the coda. We observe that the envelope of HF and VF events is frequency independent. As a consequence, a single delay time suffices to characterize envelope broadening in the 2.5-7.5 Hz band. The typical coda decay time is also frequency independent, as attested by the close to linear increase of Qc with frequency. Finally, we use elastic radiative transfer theory to perform a series of inversion of seismogram envelopes for the attenuation properties of the Martian lithosphere. The good fit between synthetic and observed envelopes confirms that multiple scattering of elastic waves released by internal sources is a plausible explanation of the events characteristics. We quantify scattering and attenuation properties of Mars and highlight the differences and similarities with the Earth and the Moon. The albedo, that is, the contribution of scattering to the total attenuation, derived from VF events is very high, which we interpret as a signature of a mostly dry medium. Our results also suggest a stratification of the scattering and attenuation properties.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Menina, SabrinaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Margerin, LudovicUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kawamura, TaichiUNSPECIFIEDorcid.org/0000-0001-5246-5561UNSPECIFIED
Lognonne, PhilippeUNSPECIFIEDorcid.org/0000-0002-1014-920XUNSPECIFIED
Marti, JulesUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Drilleau, MelanieUNSPECIFIEDorcid.org/0000-0001-5625-9706UNSPECIFIED
Calvet, MarieUNSPECIFIEDorcid.org/0000-0001-9660-5079UNSPECIFIED
Compaire, NicolasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Garcia, RaphaelUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Karakostas, FoivosUNSPECIFIEDorcid.org/0000-0001-5751-5900UNSPECIFIED
Schmerr, NicholasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
van Driel, MartinUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Staehler, Simon C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Plasman, MatthieuUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Giardini, DomenicoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Carrasco, SebastianUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Knapmeyer-Endrun, BrigitteUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sainton, GregoryUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Banerdt, William B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-600504
DOI: 10.1785/0120210127
Journal or Publication Title: Bull. Seismol. Soc. Amer.
Volume: 111
Number: 6
Page Range: S. 3016 - 3035
Date: 2021
Publisher: SEISMOLOGICAL SOC AMER
Place of Publication: ALBANY
ISSN: 1943-3573
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
LAPSE-TIME DEPENDENCE; LG CODA Q; SEISMIC ATTENUATION; SCATTERING ATTENUATION; MULTIPLE-SCATTERING; TRANSPORT-EQUATIONS; CRUSTAL SCATTERING; RADIATIVE-TRANSFER; REGION; WAVESMultiple languages
Geochemistry & GeophysicsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/60050

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