Seismic anisotropy: tracing plate dynamics in the mantle.

@article{Park2002SeismicAT,
  title={Seismic anisotropy: tracing plate dynamics in the mantle.},
  author={Jeffrey Park and Vadim Levin},
  journal={Science},
  year={2002},
  volume={296 5567},
  pages={
          485-9
        }
}
Elastic anisotropy is present where the speed of a seismic wave depends on its direction. In Earth's mantle, elastic anisotropy is induced by minerals that are preferentially oriented in a directional flow or deformation. Earthquakes generate two seismic wave types: compressional (P) and shear (S) waves, whose coupling in anisotropic rocks leads to scattering, birefringence, and waves with hybrid polarizations. This varied behavior is helping geophysicists explore rock textures within Earth's… CONTINUE READING

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