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L. Bai and J. Ritsema The effect of large-scale shear-velocity heterogeneity on SS precursor amplitudes Geophysical Research Letters 40

Version of Record online: 5 DEC 2013 | DOI: 10.1002/2013GL058669

Key Points

  • The amplitude variation due to wave focusing in a 3D Earth can be significant
  • The observed S660S/SS amplitude ratio is much smaller than PREM predictions
  • The crust has a profound influence on S410S/SS and S660S/SS amplitude ratios

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