Polarization 4
Polarization 4 :
The shape and orientation in space of the ground-motion particle trajectory. It differs for different types of seismic waves such as P, S and surface waves and may be ± linear or elliptical, prograde or retrograde. It is also influenced by heterogeneities and anisotropy of the medium in which the seismic waves propagate and depends on their frequency or wavelength, respectively. The polarization of ground motion may be reconstructed by analyzing three-component seismic recordings
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