1. A method for de-blending seismic data associated with a subsurface of the earth, the method comprising: receiving seismic data “d” recorded with one or more land receivers, wherein the seismic data includes shot recordings generated by plural sources that are simultaneously actuated; forming either a continuous receiver trace or trace segments from the received seismic data; selecting plural overlapping spatial blocks that cover the surface shot locations; assigning the shot recordings to the plural overlapping spatial blocks; applying a mathematical technique to the recordings to determine de-blended data; and generating an image of the subsurface based on the de-blended data.