Deep-origin FEAVO effects

() proves using both real and synthetic data that FEAVO effects can be generated not only by shallow velocity anomalies, but also by deep ones. They usually have a different origin than the shallow ones. They appear not because of depositional irregularities, but because of sudden terminations of thin layers with anomalous velocity against subvertical faults. The question of whether the deep-origin FEAVO behaves like its shallow counterpart and are visible in angle gathers is, therefore, legitimate.

The easiest way to answer this would be to repeat the same experiment as in the previous subsection, but real data containing deep-origin FEAVO is not yet available. Therefore, I will use synthetic data to show that wave-equation methods handle well the deep-origin FEAVO effects. These results are in Appendix A.