PROCESSING SEISMIC DATA

A method of processing seismic data comprising obtaining a seismic data volu me (1) covering the pre-determined volume of the earth; determining for each voxel (8) in the seismic data volu me (1) the local orientation of the seismic data; deter-mining for each voxel (8) whether there is an edge in its neighbourhoo d; and carrying out a smoothing operation on each voxel (8) in the seismic data volume (1), wherein the direction of the smoothing operation is the local orientation of the data and wherein the smoothing operation does not go over the edge, to obtain a processed seismic data volume in which the quantity assigned to each voxel in the processed data volume is the result obtained by carrying out th e smoothing operation in that voxel (8) in the seismic data volume (1).