Empirical H/V spectral ratios at the InSight landing site and implications for the martian subsurface structure
The horizontal-to-vertical (H/V) spectral ratio inversion is a traditional technique for deriving the local subsurface structure on Earth. We calculated the H/V from the ambient vibrations at different wind levels at the InSight landing site, on Mars, and also computed the H/V from the S-wave coda o...
| Autores: | , , , , , , , , , , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2023 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/349418 |
| Acceso en línea: | http://hdl.handle.net/10261/349418 |
| Access Level: | acceso abierto |
| Palabra clave: | Coda waves Seismic noise Site effects Martian seismology Marsquakes |
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| dc.title.none.fl_str_mv |
Empirical H/V spectral ratios at the InSight landing site and implications for the martian subsurface structure |
| title |
Empirical H/V spectral ratios at the InSight landing site and implications for the martian subsurface structure |
| spellingShingle |
Empirical H/V spectral ratios at the InSight landing site and implications for the martian subsurface structure Carrasco, Sebastián Coda waves Seismic noise Site effects Martian seismology Marsquakes |
| title_short |
Empirical H/V spectral ratios at the InSight landing site and implications for the martian subsurface structure |
| title_full |
Empirical H/V spectral ratios at the InSight landing site and implications for the martian subsurface structure |
| title_fullStr |
Empirical H/V spectral ratios at the InSight landing site and implications for the martian subsurface structure |
| title_full_unstemmed |
Empirical H/V spectral ratios at the InSight landing site and implications for the martian subsurface structure |
| title_sort |
Empirical H/V spectral ratios at the InSight landing site and implications for the martian subsurface structure |
| dc.creator.none.fl_str_mv |
Carrasco, Sebastián Knapmeyer‐Endrun, Brigitte Margerin, Ludovic Schmelzbach, C. Onodera, K. Pan, L. Lognonné, Philippe Menina, Sabrina Giardini, Domenico Stutzmann, Eléonore Clinton, John Stähler, Simon C. Schimmel, Martin Golombek, Matthew Hobiger, Manuel Hallo, Miroslav Kedar, Sharon Banerdt, William Bruce |
| author |
Carrasco, Sebastián |
| author_facet |
Carrasco, Sebastián Knapmeyer‐Endrun, Brigitte Margerin, Ludovic Schmelzbach, C. Onodera, K. Pan, L. Lognonné, Philippe Menina, Sabrina Giardini, Domenico Stutzmann, Eléonore Clinton, John Stähler, Simon C. Schimmel, Martin Golombek, Matthew Hobiger, Manuel Hallo, Miroslav Kedar, Sharon Banerdt, William Bruce |
| author_role |
author |
| author2 |
Knapmeyer‐Endrun, Brigitte Margerin, Ludovic Schmelzbach, C. Onodera, K. Pan, L. Lognonné, Philippe Menina, Sabrina Giardini, Domenico Stutzmann, Eléonore Clinton, John Stähler, Simon C. Schimmel, Martin Golombek, Matthew Hobiger, Manuel Hallo, Miroslav Kedar, Sharon Banerdt, William Bruce |
| author2_role |
author author author author author author author author author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
NASA Astrobiology Institute Centre National D'Etudes Spatiales (France) California Institute of Technology Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72] |
| dc.subject.none.fl_str_mv |
Coda waves Seismic noise Site effects Martian seismology Marsquakes |
| topic |
Coda waves Seismic noise Site effects Martian seismology Marsquakes |
| description |
The horizontal-to-vertical (H/V) spectral ratio inversion is a traditional technique for deriving the local subsurface structure on Earth. We calculated the H/V from the ambient vibrations at different wind levels at the InSight landing site, on Mars, and also computed the H/V from the S-wave coda of the martian seismic events (marsquakes). Different H/V curves were obtained for different wind periods and from the marsquakes. From the ambient vibrations, the recordings during low-wind periods are close to the instrument self-noise level. During high-wind periods, the seismic recordings are highly contaminated by the interaction of the lander with the wind and the martian ground. Therefore, these recordings are less favourable for traditional H/V analysis. Instead, the recordings of the S-wave coda of marsquakes were preferred to derive the characteristic H/V curve of this site between 0.4 and 10 Hz. The final H/V curve presents a characteristic trough at 2.4 Hz and a strong peak at 8 Hz. Using a full diffuse wavefield approach as the forward computation and the Neighbourhood Algorithm as the sampling technique, we invert for the 1-D shear wave velocity structure at the InSight landing site. Based on our inversion results, we propose a strong site effect at the InSight site to be due to the presence of a shallow high-velocity layer (SHVL) over low-velocity units. The SHVL is likely placed below a layer of coarse blocky ejecta and can be associated with Early Amazonian basaltic lava flows. The units below the SHVL have lower velocities, possibly related to a Late Hesperian or Early Amazonian epoch with a different magmatic regime and/or a greater impact rate and more extensive weathering. An extremely weak buried low velocity layer (bLVL) between these lava flows explains the data around the 2.4 Hz trough, whereas a more competent bLVL would not generate this latter feature. These subsurface models are in good agreement with results from hammering experiment and compliance measurements at the InSight landing site. Finally, this site effect is revealed only by seismic events data and explains the larger horizontal than vertical ground motion recorded for certain type of marsquakes. |
| publishDate |
2023 |
| dc.date.none.fl_str_mv |
2023 2024 2024 2024 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 Publisher's version info:eu-repo/semantics/publishedVersion |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/10261/349418 |
| url |
http://hdl.handle.net/10261/349418 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
http://dx.doi.org/10.1093/gji/ggac391 Sí |
| dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess |
| eu_rights_str_mv |
openAccess |
| dc.publisher.none.fl_str_mv |
Oxford University Press |
| publisher.none.fl_str_mv |
Oxford University Press |
| dc.source.none.fl_str_mv |
reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC) |
| instname_str |
Consejo Superior de Investigaciones Científicas (CSIC) |
| reponame_str |
DIGITAL.CSIC. Repositorio Institucional del CSIC |
| collection |
DIGITAL.CSIC. Repositorio Institucional del CSIC |
| repository.name.fl_str_mv |
|
| repository.mail.fl_str_mv |
|
| _version_ |
1869419927966842880 |
| spelling |
Empirical H/V spectral ratios at the InSight landing site and implications for the martian subsurface structureCarrasco, SebastiánKnapmeyer‐Endrun, BrigitteMargerin, LudovicSchmelzbach, C.Onodera, K.Pan, L.Lognonné, PhilippeMenina, SabrinaGiardini, DomenicoStutzmann, EléonoreClinton, JohnStähler, Simon C.Schimmel, MartinGolombek, MatthewHobiger, ManuelHallo, MiroslavKedar, SharonBanerdt, William BruceCoda wavesSeismic noiseSite effectsMartian seismologyMarsquakesThe horizontal-to-vertical (H/V) spectral ratio inversion is a traditional technique for deriving the local subsurface structure on Earth. We calculated the H/V from the ambient vibrations at different wind levels at the InSight landing site, on Mars, and also computed the H/V from the S-wave coda of the martian seismic events (marsquakes). Different H/V curves were obtained for different wind periods and from the marsquakes. From the ambient vibrations, the recordings during low-wind periods are close to the instrument self-noise level. During high-wind periods, the seismic recordings are highly contaminated by the interaction of the lander with the wind and the martian ground. Therefore, these recordings are less favourable for traditional H/V analysis. Instead, the recordings of the S-wave coda of marsquakes were preferred to derive the characteristic H/V curve of this site between 0.4 and 10 Hz. The final H/V curve presents a characteristic trough at 2.4 Hz and a strong peak at 8 Hz. Using a full diffuse wavefield approach as the forward computation and the Neighbourhood Algorithm as the sampling technique, we invert for the 1-D shear wave velocity structure at the InSight landing site. Based on our inversion results, we propose a strong site effect at the InSight site to be due to the presence of a shallow high-velocity layer (SHVL) over low-velocity units. The SHVL is likely placed below a layer of coarse blocky ejecta and can be associated with Early Amazonian basaltic lava flows. The units below the SHVL have lower velocities, possibly related to a Late Hesperian or Early Amazonian epoch with a different magmatic regime and/or a greater impact rate and more extensive weathering. An extremely weak buried low velocity layer (bLVL) between these lava flows explains the data around the 2.4 Hz trough, whereas a more competent bLVL would not generate this latter feature. These subsurface models are in good agreement with results from hammering experiment and compliance measurements at the InSight landing site. Finally, this site effect is revealed only by seismic events data and explains the larger horizontal than vertical ground motion recorded for certain type of marsquakes.The authors acknowledge National Aeronautics and Space Administration (NASA), Centre National D’études Spatiales (CNES), their partner agencies and institutions (United Kingdom Space Agency [UKSA], Swiss Space Office [SSO], Deutsches Zentrum für Luft-und Raumfahrt [DLR], Jet Propulsion Laboratory [JPL], Institut du Physique du Globe de Paris [IPGP]—Centre National de la Recherche Scientifique-École Normale Supérieure [CNRS], Eldgenössische Technische Hochschule Zürich [ETHZ], Imperial college [IC], Max Planck Institute for Solar System Research [MPS-MPG]), and the flight operations team at JPL, SEIS on Mars Operation Center (SISMOC), Mars SEIS Data Service (MSDS), Incorporated Research Institutions for Seismology–Data Management Center (IRIS-DMC) and Planetary Data System (PDS) for providing SEED Seismic Experiment for Interior Structure (SEIS) data. We acknowledge funding from (1) Swiss State Secretariat for Education, Research and Innovation (SEFRI project ‘Marsquake Service-Preparatory Phase’), (2) ETH Research grant ETH-0617–02, and (3) ETH + 02 19–1: Planet MARS. The research was carried out in part at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004). This is the InSight contribution number 268.Oxford University PressNASA Astrobiology InstituteCentre National D'Etudes Spatiales (France)California Institute of TechnologyConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2024202420232024info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/349418reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1093/gji/ggac391Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3494182026-05-22T06:33:51Z |
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15,812429 |