Abstract
In multilayered media one normally observes two distinct shear‐wave phases that are polarized perpendicularly to each other and propagate at different velocities. One of them, the SH-wave, is a pure shear wave with particle motion parallel to layer interfaces and strictly perpendicular to the incidence plane and the propagation direction. The other one, the qSV-wave, is a so‐called quasi‐shear wave whose particle motion also contains a longitudinal portion. The velocities and attenuations of both phases depend on the frequency and the angle of incidence. However, this dependence is different for SH-waves and qSV-waves.
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