This book first attempts to formulate the problem of 'migration’ as a method applied in seismic prospecting and then to comprehend the unifying fundamentals of the numerous and various migration techniques now in use. Guidelines are offered for the practical implementation of this method in complex structural as well as stratigraphic environment and the shortcomings and limitations that ought to be kept in mind when accomplishing migration or interpreting the resultant data are discussed. It will prove of use not only to practising professionals engaged in designing or running migration procedures, but also to those who would rather deal with the results of migration.