Editor's note: A more extended and mathematically sophisticated treatment of this material can be found in “Seismic modeling by demigration” in the July–August issue of Geophysics.

A new process in seismic reflection imaging called demigration has been designed as the inverse of migration and is, thus, easily confused with forward modeling. This paper will clarify the similarities and differences of modeling and demigration, and how both are related to migration.

An often-heard statement is that “seismic forward modeling is the inverse of seismic migration.” We do not agree. In our opinion, seismic demigration deserves this title; forward...

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