Abstract: A diagnostic seismic process for generating, recognizing, and remotely examining subterranean three-dimensional objects or sub-volumes uses processed seismic reflection data to produce high-resolution quantitatively measurable, three-dimensional images of buried objects. Examples of such objects are hydrocarbon reservoirs and their encasing rocks; fresh water aquifers; hazardous waste contaminants zones; potential drilling and mining hazards; unexploded military ordnance; caves; tunnels; historical and archeological artifacts and the like. The present invention examines the interior portions of underground sub-volumes called common-impedance objects imbedded in a relatively transparent background of seismic impedance sample voxels. Acquire available data sets for the area of interest (wellpaths, log curves, time-depth charts, etc.) and acquire an appropriate three-dimensional reflection seismic data volume.