English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Autocorrelation of the Ground Vibrations Recorded by the SEIS-InSight Seismometer on Mars

Compaire, N., Margerin, L., Garcia, R. F., Pinot, B., Calvet, M., Orhand-Mainsant, G., et al. (2021). Autocorrelation of the Ground Vibrations Recorded by the SEIS-InSight Seismometer on Mars. Journal of Geophysical Research: Planets, 126(4): e2020JE006498. doi:10.1029/2020JE006498.

Item is

Basic

show hide
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Compaire, N., Author
Margerin, L., Author
Garcia, R. F., Author
Pinot, B., Author
Calvet, M., Author
Orhand-Mainsant, G., Author
Kim, D., Author
Lekic, V., Author
Tauzin, B., Author
Schimmel, M., Author
Stutzmann, E., Author
Knapmeyer-Endrun, B., Author
Lognonné, P., Author
Pike, W. T., Author
Schmerr, N., Author
Gizon, Laurent1, Author              
Banerdt, W. B., Author
Affiliations:
1Department Solar and Stellar Interiors, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832287              

Content

show
hide
Free keywords: -
 Abstract: Since early February 2019, the SEIS (Seismic Experiment for Interior Structure) seismometer deployed at the surface of Mars in the framework of the InSight mission has been continuously recording the ground motion at Elysium Planitia. In this study, we take advantage of this exceptional data set to put constraints on the crustal properties of Mars using seismic interferometry (SI). To carry out this task, we first examine the continuous records from the very broadband seismometer. Several deterministic sources of environmental noise are identified and specific preprocessing strategies are presented to mitigate their influence. Applying the principles of SI to the single-station configuration of InSight, we compute, for each Sol and each hour of the martian day, the diagonal elements of the time-domain correlation tensor of random ambient vibrations recorded by SEIS. A similar computation is performed on the diffuse waveforms generated by more than a hundred Marsquakes. A careful signal-to-noise ratio analysis and an inter-comparison between the two datasets suggest that the results from SI are most reliable in a narrow frequency band around 2.4 Hz, where an amplification of both ambient vibrations and seismic events is observed. The average autocorrelation functions (ACFs) contain well identifiable seismic arrivals, that are very consistent between the two datasets. Interpreting the vertical and horizontal ACFs as, respectively, the P- and S- seismic reflectivity below InSight, we propose a simple stratified velocity model of the crust, which is mostly compatible with previous results from receiver function analysis. Our results are discussed and compared to recent works from the literature.

Details

show
hide
Language(s): eng - English
 Dates: 2021
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1029/2020JE006498
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Journal of Geophysical Research: Planets
  Other : JGR-E
  Abbreviation : J. Geophys. Res. - E
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Washington, D.C. : American Geophysical Union
Pages: - Volume / Issue: 126 (4) Sequence Number: e2020JE006498 Start / End Page: - Identifier: ISSN: 2169-9100
CoNE: https://pure.mpg.de/cone/journals/resource/2169-9100