metastable olivine wedge, seismic intensity, Pacific slab, stochastic waveguide, numerical simulation, deep‐focus earthquake, Earthquakes, Dispersion (wave), Seismic activity, Shaking, Waves, Direction, Depth, Reduction, Wave propagation, Phases, Forward scattering, Seismic propagation, Attenuation, Seismic waves, Slabs, Width, Olivine, Motion, Wave attenuat...