Earth science : Mantle deformation or processing artefact?

Wookey et al. reply-Saul and Vinnik's comment raises an interesting point concerning the influence of shear-coupled P-waves (such as SPmP) on shear- wave-splitting analysis. We used a method that applies a time window to the data, so P-wave energy on the horizontal components outside this window will have no effect on the analysis. As all but one of our events were recorded at stations located on thick (40-50 km) continental crust, the Moho multiple arrivals to which we refer will generally be separated (>8 s for SPmP) from the main S-wave arrival. Error can occur when P-wave energy falls within the analysis window.