Conclusions

We have presented a new approach to the construction of image perturbations for velocity analysis using WEMVA. This method directly constructs the image perturbation from the background image, and is always compliant with the Born approximation which is the underlying assumption of WEMVA. We show that, given correct scaling, we can obtain slowness anomalies that are fully consistent with those obtained by the application of the forward and adjoint WEMVA operators.