Many researchers have used the birefringence of P‑to‑S converted waves from Moho discontinuity to constrain anisotropy Earth’s crust. However, this practice ignores substantial influence that has on initial amplitude wave, which adds splitting acquired during its propagation seismometer. We find large variations in Ps estimates with back-azimuth occur theoretically presence P‑wave anisotropy, n...

A typical imaging condition for seismic reflection data involves source and receiver wavefield matching, e.g. by cross-correlation, at every image location. This statement is true no matter how the two wavefields are reconstructed, for example by one-way wavefield extrapolation, or two-way reverse-time extrapolation, or Kirchhoff integral methods. This statement is also true when the source and...

Abstract. In the frame of AlpArray project we analyse teleseismic data from permanent and temporary stations Alpine region to study seismic discontinuities down about 140 km depth. We average broadband S-waveform retrieve S-to-P converted signals below stations. order avoid processing artefacts, no deconvolution or filtering is applied, S arrival times are used as reference for stacking. show a...

Receiver function is defined as the spectral ratio of the radial component and the vertical component of the ground motion. It is used to characterize converted waves. We extend the use of the receiver function to downhole data using waves recorded in a borehole, excited by an earthquake of magnitude 4.0 near San Francisco, California, on 26 June 1994. The focal depth of the event was 6.6 km an...