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The virtual refraction: Useful spurious energy in seismic interferometry
Seismic interferometry is rapidly becoming an established technique to recover the Green's function between receivers, but practical limitations in the source-energy distribution inevitably lead to spurious energy in the results. Instead of attempting to suppress all such energy, we use a spurious wave associated with the crosscorrelation of refracted energy at both receivers to infer estimates of subsurface parameters. We named this spurious event the virtual refraction. Illustrated by adoi:10.1190/1.3095659 fatcat:6lxvw66sfzcrtgnwoahudswrya