Data for Seismic properties of the Nazca oceanic crust in southern Peruvian subduction system

This supplementary file describes (1) data processing for teleseismic receiver function (RF), (2) RF amplitude inversion, and (3) calculation of velocities of candidate phases from experimental mineral physics data. 1. Data processing for teleseismic receiver function Identification of strong and sharp amplitudes of the P-to-S converted phase (hereafter, Ps) is crucial in this analysis. We try two different rotation coordinate systems (R-T-Z; e.g., Zhu and Kanamori, 2000) and (L-Q-T; e.g., Vinnik, 1977) to examine variations of the converted amplitudes. Phillips et al. (2012) and Phillips and Clayton (2014) used the R-T-Z coordinate system to identify the overall Peruvian crustal and slab structure using the same seismic network data. Yuan et al. (2000) and Sodoudi et al. (2011) used the L-Q-T coordinate system to image the slab structure beneath northern Chile. In this study, we only use subsets of the stations in the seismogenic zone (from the coast to the inland, up to 150 km; Fig. 2), which show clear Ps conversions at the top and bottom interface of the subducting crust. After the coordinate transformation, the R (or L) component seismograms are deconvolved with Z (or