Abstract: A system and a method for evaluating a time-lapse seismic signal recording using shifted normalized root mean square (sNRMS) metric are described. The method includes inputting two seismic traces that include similar or repeatable signals; isolating two signals for analysis from other signals in the two seismic traces, the two signals being time shifted relative to each other; and determining a normalized cross-correlation of the two signals at different time shifts between the two signals. The method further includes determining an optimum time shift closest to zero time shift where the normalized cross-correlation is maximum; computing a shifted normalized root mean square value at the optimum time shift; and determining a repeatability quality of the two signals based on the shifted normalized root mean square value.