1. A method, performed in at least one processor, for generating a similarity indicator between a plurality of seismic datasets, said method comprising: obtaining a first seismic dataset collected at a first time and second seismic dataset collected at a second time; calculating a first image registration metric based on at least one of said first seismic and said second seismic dataset; calculating a second image registration metric based on at least one of said first seismic data set and said second seismic dataset; and generating a similarity indicator between said first seismic dataset and said second seismic dataset using said first and second image registration metrics.