Random boundary condition for low-frequency wave propagation

Random boundary condition for low-frequency wave propagation

Xukai Shen and Robert G. Clapp

Abstract:

In this paper we present a random boundary that is effective at both high-frequencies (Reverse Time Migration) and low-frequencies (waveform inversion). This boundary condition uses larger, irregularly-shaped randomized velocity grains that are effective in introducing incoherency in wavefronts at a large range of wavelengths. We use source functions with a range of peak frequencies to compare this boundary condition to alternative implementations.