Interpolation of Green's function around the PKP triplication. The ‘exact’ Single-Side Green's Tensors (red lines) are calculated with DSM at 20 km depth. The blue lines show the interpolated Single-Side Green's Tensors without (top panel) and with (bottom panel) normal move-out corrections for a slowness of 2.56 s deg⁻¹ which corresponds to a PKPbc wave observed at an epicentral distance of 150°. All the traces are bandpass filtered between 0.1 and 1.0 Hz. Note the strong spatial aliasing on the interpolated traces when the normal move-out corrections are omitted.