1. n. [Geophysics]
The apparent source of a received wave. The image is the point in the subsurface that the rays would appear to have come from if they were not reflected, but were shot up from below. A ray that travels from a source and is reflected to a geophone has the same appearance as a ray that travels straight from the image and up to the geophone.
2. n. [Geophysics]
A representation that depicts the subsurface in two or more dimensions.