Monte Carlo simulations of coupled body- and Rayleigh-wave multiple scattering in elastic media

SUMMARY Seismic coda waves are commonly used in estimation of subsurface Q values and monitoring changes. Coda mainly consist multiply scattered body surface waves. These two types interact with each other the multiple scattering process, which thus leads to a spatiotemporal evolution wave energies. One cannot characterize because one has not fully understood Thus assumes only type exists or ignores their interaction while studying However, neglecting an incorrect energy consequently biases interpretation changes for monitoring. To better understand between these during model correctly, we propose Monte Carlo algorithm process. We describe physics derive properties like cross sections perturbations elastic (e.g. density, shear modulus Lamé parameters). Our incorporates this knowledge physically models body- space time. The partitioning ratios provided by our match theoretical prediction based on equipartition theory. In state, simulation results also Lambert’s cosine law free surface. discuss how Rayleigh-to-body-wave affects ratios. provides new tool study media