Universität zu Köln

Schimmel, Martin ORCID: 0000-0003-2601-4462, Stutzmann, Eleonore ORCID: 0000-0002-4348-7475, Lognonne, Philippe ORCID: 0000-0002-1014-920X, Compaire, Nicolas, Davis, Paul, Drilleau, Melanie ORCID: 0000-0001-5625-9706, Garcia, Raphael, Kim, Doyeon ORCID: 0000-0003-4594-2336, Knapmeyer-Endrun, Brigitte ORCID: 0000-0003-3309-6785, Lekic, Vedran ORCID: 0000-0002-3548-272X, Margerin, Ludovic ORCID: 0000-0003-4848-3227, Panning, Mark, Schmerr, Nicholas, Scholz, John Robert, Spiga, Aymeric, Tauzin, Benoit and Banerdt, Bruce (2021). Seismic Noise Autocorrelations on Mars. Earth Space Sci., 8 (6). WASHINGTON: AMER GEOPHYSICAL UNION. ISSN 2333-5084

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Abstract

Mars is the first extraterrestrial planet with seismometers (Seismic Experiment for Interior Structure, SEIS) deployed directly on its surface in the framework of the Interior Exploration using Seismic Investigations, Geodesy and Heat Transport (InSight) mission. The lack of strong Marsquakes, however, strengthens the need of seismic noise studies to additionally constrain the Martian structure. Seismic noise autocorrelations of single-station recordings permit the determination of the zero-offset reflection response underneath SEIS. We present a new autocorrelation study which employs state-of-the-art approaches to determine a robust reflection response by avoiding bias from aseismic signals which are recorded together with seismic waves due to unfavorable deployment and environmental conditions. Data selection and segmentation is performed in a data-adaptive manner which takes the data root-mean-square amplitude variability into account. We further use the amplitude-unbiased phase cross-correlation and work in the 1.2-8.9 Hz frequency band. The main target are crustal scale reflections, their robustness and convergence. The strongest signal appears at 10.6 s, and, if interpreted as a P-wave reflection, would correspond to a discontinuity at about 21 km depth. This signal is a likely candidate for a reflection from the base of the Martian crust due to its strength, polarity, and stability. Additionally we identify, among the stable signals, a signal at about 6.15 s that can be interpreted as the P-wave reflection from the mid-crust at about 9.5 km depth.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Schimmel, Martin UNSPECIFIED orcid.org/0000-0003-2601-4462 UNSPECIFIED Stutzmann, Eleonore UNSPECIFIED orcid.org/0000-0002-4348-7475 UNSPECIFIED Lognonne, Philippe UNSPECIFIED orcid.org/0000-0002-1014-920X UNSPECIFIED Compaire, Nicolas UNSPECIFIED UNSPECIFIED UNSPECIFIED Davis, Paul UNSPECIFIED UNSPECIFIED UNSPECIFIED Drilleau, Melanie UNSPECIFIED orcid.org/0000-0001-5625-9706 UNSPECIFIED Garcia, Raphael UNSPECIFIED UNSPECIFIED UNSPECIFIED Kim, Doyeon UNSPECIFIED orcid.org/0000-0003-4594-2336 UNSPECIFIED Knapmeyer-Endrun, Brigitte UNSPECIFIED orcid.org/0000-0003-3309-6785 UNSPECIFIED Lekic, Vedran UNSPECIFIED orcid.org/0000-0002-3548-272X UNSPECIFIED Margerin, Ludovic UNSPECIFIED orcid.org/0000-0003-4848-3227 UNSPECIFIED Panning, Mark UNSPECIFIED UNSPECIFIED UNSPECIFIED Schmerr, Nicholas UNSPECIFIED UNSPECIFIED UNSPECIFIED Scholz, John Robert UNSPECIFIED UNSPECIFIED UNSPECIFIED Spiga, Aymeric UNSPECIFIED UNSPECIFIED UNSPECIFIED Tauzin, Benoit UNSPECIFIED UNSPECIFIED UNSPECIFIED Banerdt, Bruce UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-603771
DOI:	10.1029/2021EA001755
Journal or Publication Title:	Earth Space Sci.
Volume:	8
Number:	6
Date:	2021
Publisher:	AMER GEOPHYSICAL UNION
Place of Publication:	WASHINGTON
ISSN:	2333-5084
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language RAYLEIGH-WAVE ELLIPTICITY; RECEIVER FUNCTIONS; GREENS-FUNCTION; EXTRACTION; BASIN; CRUST; ZONE Multiple languages Astronomy & Astrophysics; Geosciences, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/60377