Our goal is to analyze these methods, Single-arrival Kirchhoff migration is an accurate and with an eye to determining how large their niches are in the reliable depth migration method except in cases of extreme imaging hierarchy. If, for example, we can determine that geologic complexity, where it is not as accurate as most Gaussian beam migration has accuracy comparable to an wavefield continuation methods. Also, where geology is average single-arrival Kirchhoff migration and a cost extremely complex and multipathing occurs, its reliance on comparable to shot-record migration by wavefield migrated image gathers indexed by offset (while more continuation, then we can state that the niche for this convenient than image gathers indexed by shot number) migration method is very small indeed. However, given causes problems for both amplitude analysis and velocity impressive results on Gaussian beam migration reported by analysis. On the other hand, most wavefield continuation Hill (2001) and on multi-arrival Kirchhoff migration by methods are relatively expensive, and problems with Brandsberg-Dahl et al. (2001) and by Xu et al. (2001), we amplitudes and migrated image gathers remain. Multiarrival expect methods such as these to contribute significantly to Kirchhoff migration can, to a large degree, future imaging projects. Eventually, these methods might overcome the problems associated with both single-arrival supplant single-arrival Kirchhoff migration as a workhorse Kirchhoff and wavefield continuation methods, but the data method in the years ahead, as greater accuracy becomes a flow problems can be serious in a production environment.