Construction of finite-frequency kernels using adjoint methods

This chapter contains excerpts from “Seismic tomography, adjoint methods, time reversal, and banana-doughnut kernels,” by Jeroen Tromp, Carl Tape, and Qinya Liu. My primary contribution to this study was to adapt a 2D SEM wave propagation code to construct finitefrequency kernels. In a series of numerical experiements, I illustrated the formation of finitefrequency sensitivity kernels via the interaction between a forward wavefield (s), propagating from source to receiver, with an adjoint wavefield (s), propagating from receiver to source. In this chapter, I have included some additional figures to complement those in Tromp et al. (2005).