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Improved Holistic Analysis of Rayleigh Waves for Single- and Multi-Offset Data: Joint Inversion of Rayleigh-Wave Particle Motion and Vertical- and Radial-Component Velocity Spectra
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SYSNO ASEP 0483781 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Improved Holistic Analysis of Rayleigh Waves for Single- and Multi-Offset Data: Joint Inversion of Rayleigh-Wave Particle Motion and Vertical- and Radial-Component Velocity Spectra Author(s) Dal Moro, Giancarlo (USMH-B) RID, ORCID, SAI
Moustafa, S.S.R. (SA)
Al-Arifi, N. (SA)Source Title Pure and Applied Geophysics. - : Springer - ISSN 0033-4553
Roč. 175, č. 1 (2018), s. 67-88Number of pages 22 s. Publication form Print - P Language eng - English Country CH - Switzerland Keywords surface wave dispersion ; joint inversion of seismic data ; Rayleigh waves ; holistic analysis of surface waves Subject RIV DC - Siesmology, Volcanology, Earth Structure OECD category Volcanology Institutional support USMH-B - RVO:67985891 UT WOS 000419674100005 EID SCOPUS 85040246548 DOI 10.1007/s00024-017-1694-8 Annotation Rayleigh waves often propagate according to complex mode excitation so that the proper identification and separation of specific modes can be quite difficult or, in some cases, just impossible. Furthermore, the analysis of a single component (i.e., an inversion procedure based on just one objective function) necessarily prevents solving the problems related to the non-uniqueness of the solution. To overcome these issues and define a holistic analysis of Rayleigh waves, we implemented a procedure to acquire data that are useful to define and efficiently invert the three objective functions defined from the three following “objects”: the velocity spectra of the vertical- and radial-components and the Rayleigh-wave particle motion (RPM) frequency-offset data. Two possible implementations are presented. In the first case we consider classical multi-offset (and multi-component) data, while in a second possible approach we exploit the data recorded by a single three-component geophone at a fixed offset from the source. Given the simple field procedures, the method could be particularly useful for the unambiguous geotechnical exploration of large areas, where more complex acquisition procedures, based on the joint acquisition of Rayleigh and Love waves, would not be economically viable. After illustrating the different kinds of data acquisition and the data processing, the results of the proposed methodology are illustrated in a case study. Finally, a series of theoretical and practical aspects are discussed to clarify some issues involved in the overall procedure (data acquisition and processing). Workplace Institute of Rock Structure and Mechanics Contact Iva Švihálková, svihalkova@irsm.cas.cz, Tel.: 266 009 216 Year of Publishing 2019
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