Elastic multi-component synthetic seismic records in the modified Hess models with different surface topographies. The top rows (a, b, and c) are the horizontal component seismic records, and the bottom rows (d, e, and f) are the vertical component seismic records. (a and d) The seismic records in the horizontal surface model. (b and e) The seismic records in the smooth surface model, calculated using the suggested approach. (c and f) The seismic records in the unsmooth surface model, also computed by the proposed method.