f A massively parallel implementation of prestack Kirchhoff depth migration

Integral or Kirchhoff migration methods compute the integral solution of the wave equation, and have been used extensively in seismic imaging (Schneider, 1978; Berryhill, 1979; Berkhout, 1980). For each image point in the subsurface, these methods sum amplitudes of the recorded wavefield along a diffraction curve. The shape of the diffraction curve is described by the impulse response of the image point, the Green function, which depends on the velocity field and the shot-geophone geometry.