LINEAR PHASE FILTERING OF MULTICOMPONENT SEISMIC DATA

Abstract

The phase relationships between the vertical and horizontal components of motion at a free surface differ between the various modes of propagation. These differences in phase between the components of motion may be made the basis for a linear filtering technique to separate P, S, and Rayleigh waves when the components of motion at the free surface are recorded in reproducible form. In this paper, a set of linear filters is derived and applied to some three‐component reflection seismograph field data that separate P and Rayleigh wave motion on the basis of their phase relations between horizontal and vertical components of motion at the free surface. A comparison is made between the linear phase filtering technique, and the “Polarization Filtering” technique of Shimshoni and Smith, and a multichannel Wiener deconvolution using the vertical and horizontal components of motion as input channels.