Universität zu Köln

Joshi, Rakshit ORCID: 0000-0002-0434-4199, Knapmeyer-Endrun, Brigitte ORCID: 0000-0003-3309-6785, Mosegaard, Klaus ORCID: 0000-0001-5292-5249, Igel, Heiner and Christensen, Ulrich R. (2021). Joint Inversion of Receiver Functions and Apparent Incidence Angles for Sparse Seismic Data. Earth Space Sci., 8 (10). WASHINGTON: AMER GEOPHYSICAL UNION. ISSN 2333-5084

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Abstract

The estimation of crustal structure and thickness is essential in understanding the formation and evolution of terrestrial planets. Initial planetary missions with seismic instrumentation on board face the additional challenge of dealing with seismic activity levels that are only poorly constrained a priori. For example, the lack of plate tectonics on Mars leads to low seismicity, which could, in turn, hinder the application of many terrestrial data analysis techniques. Here we propose using a joint inversion of receiver functions and apparent incidence angles, which contain information on absolute S-wave velocities of the subsurface. Since receiver function inversions suffer from a velocity depth trade-off, we in addition exploit a simple relation that defines apparent S-wave velocity as a function of observed apparent P-wave incidence angles to constrain the parameter space. We then use the Neighborhood Algorithm for the inversion of a suitable joint objective function. The resulting ensemble of models is then used to derive uncertainty estimates for each model parameter. In preparation for the analysis of data from the InSight mission, we show the application of our proposed method on Mars synthetics and sparse terrestrial data sets from different geological settings using both single and multiple events. We use information-theoretic statistical tests as model selection criteria and discuss their relevance and implications in a seismological framework.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Joshi, Rakshit UNSPECIFIED orcid.org/0000-0002-0434-4199 UNSPECIFIED Knapmeyer-Endrun, Brigitte UNSPECIFIED orcid.org/0000-0003-3309-6785 UNSPECIFIED Mosegaard, Klaus UNSPECIFIED orcid.org/0000-0001-5292-5249 UNSPECIFIED Igel, Heiner UNSPECIFIED UNSPECIFIED UNSPECIFIED Christensen, Ulrich R. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-588101
DOI:	10.1029/2021EA001733
Journal or Publication Title:	Earth Space Sci.
Volume:	8
Number:	10
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 CRUSTAL STRUCTURE; UPPER-MANTLE; MOHO DEPTH; NEIGHBORHOOD ALGORITHM; GEOPHYSICAL INVERSION; STRUCTURE BENEATH; SEISMOGRAMS; WAVES; POLARIZATION; VELOCITIES Multiple languages Astronomy & Astrophysics; Geosciences, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/58810