APPARATUS AND METHOD FOR ACCURATELY DETERMINING THE LOCATION OF EVENTS SUCH AS PEAKS IN SEISMIC DATA

An operator sitting at a workstation (110) views, on a display, a multitude of seismic traces having one or more horizons indicated therein by a plurality of set of events (such as peaks or troughs or zero crossings) (78) on the seismic traces. The operator uses a mouse (120) to draw a line from left to right across a plurality of seismic traces being displayed (110b) on the workstation display screen (110b). At this point, the line does not lie on the events (such as the peaks) (188) of the seismic traces. Therefore, the line does not yet represent a horizon (62) in an earth formation. The operator pressing of this key, the workstation processor executes a (110) snapped software (116) in accordance with the present invention. When the snapped software (116) of the present invention is executed, the line, previously drawn by the operator (110b) across the seismic traces on the workstation (110) display screen, moves from one location (124), not corresponding to the events (such as the peaks) of the seismic traces, to another location, not corresponding to the events (such as the peaks) of the seismic traces.