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Article Dans Une Revue Geophysical Journal International Année : 2017

On the reliability of direct Rayleigh-wave estimation from multicomponent cross-correlations

Zongbo Xu
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Résumé

Seismic interferometry is routinely used to image and characterize underground geology. The vertical component cross-correlations (CZZ) are often analysed in this process; although one can also use radial component and multicomponent cross-correlations (CRR and CZR, respectively), which have been shown to provide a more accurate Rayleigh-wave Green’s function than CZZ when sources are unevenly distributed. In this letter, we identify the relationship between the multicomponent cross-correlations (CZR and CRR) and the Rayleigh-wave Green’s functions to show why CZR and CRR are less sensitive than CZZ to non-stationary phase source energy. We demonstrate the robustness of CRR with a synthetic seismic noise data example. These results provide a compelling reason as to why CRR should be used to estimate the dispersive characteristics of the direct Rayleigh wave with seismic interferometry when the signal-tonoise ratio is high.
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Dates et versions

hal-03919225 , version 1 (02-01-2023)

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Zongbo Xu, T. Dylan Mikesell. On the reliability of direct Rayleigh-wave estimation from multicomponent cross-correlations. Geophysical Journal International, 2017, 210 (3), pp.1388-1393. ⟨10.1093/gji/ggx228⟩. ⟨hal-03919225⟩
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