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Reflection and transmission of surface waves at a vertical discontinuity and imaging of lateral heterogeneity using reflected fundamental Rayleigh waves

T. Meier, P. G. Malischewsky and H. Neunhoefer
Reflection and transmission of surface waves at a vertical discontinuity and imaging of lateral heterogeneity using reflected fundamental Rayleigh waves
Bulletin of the Seismological Society of America (December 1997) 87 (6): 1648-1661

Abstract

We present a technique for the determination of approximate reflection and transmission coefficients of surface-wave modes for a vertical plane discontinuity that is simple to use. It is applied to different models of lateral heterogeneity. Furthermore, a method for the localization of lateral heterogeneity using the coda of the fundamental Rayleigh mode is proposed. In particular, the frequency content of surface waves enables the investigation of the lower crust and the uppermost mantle. Lateral changes of the S-wave velocity, density, and P-wave velocity lead to the formation of the coda of the fundamental Rayleigh mode that contains delayed surface waves that reach the recording station indirectly. The complicated structure of the coda makes it impossible to identify reflected surface waves visually using a small number of recordings only. Coda waveforms of a large number of source-station pairs are inverted simultaneously for experimental reflection coefficients. The method is successfully tested using an ultrasonic model experiment. Finally, it is applied to Central Europe and especially to the Tornquist zone (TZ), mainly using records of the German Regional Seismological Network (GRSN). The resulting reflection coefficients depend on frequency and give an image of the location of reflectors.


ISSN: 0037-1106
EISSN: 1943-3573
Coden: BSSAAP
Serial Title: Bulletin of the Seismological Society of America
Serial Volume: 87
Serial Issue: 6
Title: Reflection and transmission of surface waves at a vertical discontinuity and imaging of lateral heterogeneity using reflected fundamental Rayleigh waves
Affiliation: Friedrich-Schiller University Jena, Institute of Geosciences, Jena, Federal Republic of Germany
Pages: 1648-1661
Published: 199712
Text Language: English
Publisher: Seismological Society of America, Berkeley, CA, United States
References: 30
Accession Number: 1998-031914
Categories: Solid-earth geophysicsSeismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sketch maps
N45°30'00" - N55°00'00", E06°00'00" - E24°00'00"
Secondary Affiliation: Stauffenbergstr. 11, DEU, Federal Republic of Germany
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 199813
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