Seismic evidence for a 1000 km mantle discontinuity under the pacific

HIGHLIGHTS

• who: Zhendong Zhang from the Wavefield extrapolation With reverse-time migration, the term GT u22c5 d in Eq(1) is firmly rooted in the full physics of wave propagation, unlike ray-based methods. We use the spectral-element solver, SPECFEM_ D_Globe46, and a recent high-resolution three-dimensional (3-D) elastic Earth model, GLADM2538, which is radially anisotropic in the upper mantle. The meshing and simulation parameters are identical to those used by Lei et_al38. The effects of attenuation, following the, D , model, are accommodated in forward and adjoint simulations. Specifically, we performed our simulations at the . . .
  

   

  

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