Body wave observations from cross-correlations of ambient seismic noise: A case 
study from the Karoo, RSA

Ryberg, Trond

doi:10.1029/2011GL047665

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Body wave observations from cross-correlations of ambient seismic noise: A case study from the Karoo, RSA

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Ryberg, Trond
2.2 Geophysical Deep Sounding, 2.0 Physics of the Earth, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
Publikationen aller GIPP-unterstützten Projekte, Deutsches GeoForschungsZentrum;

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Ryberg, T. (2011): Body wave observations from cross-correlations of ambient seismic noise: A case study from the Karoo, RSA. - Geophysical Research Letters, 38, L13311.
https://doi.org/10.1029/2011GL047665

Cite as: https://gfzpublic.gfz.de/pubman/item/item_243659

Abstract

In the past decade the analysis of seismic noise has become an efficient tool to recover the Green's function between pairs of receivers by cross-correlation of seismic traces. Most studies focus on the investigation of the surface wave component of the ambient noise. Several attempts to recover the body wave part of the Green's function have been documented. In this paper I present the results of cross-correlation of seismic noise and the retrieval of refracted and reflected P-waves along a seismic line in the Karoo region (Republic of South Africa). Body wave refractions (direct phases) and reflections have been observed in the Green's functions derived from ambient noise records of up to 60 hours. The results are compared with shot gathers from a controlled source experiment (borehole explosions), carried out along the same line. The significant potential of ambient noise analysis, especially with respect to P-wave reflections will be shown and discussed.