1. In a process for generating an image of geological structures of a subterranean formation using marine seismic techniques in which two or more sources activated at different source positions and with a random time delay between each activation, the reflections from the subterranean formation recorded as blended seismic data having one or more traces, each trace records seismic data generated by a detector in response to activation of the two or more sources, the specific improvement consisting of: forming a blending matrix, each blending matrix element represents a phase associated with the random time delay between activation of the two or more sources; for each temporal window in a sequence of overlapping temporal windows containing reflection events recorded in the blended seismic data, minimizing a residual between the blended seismic data and a product of predicted deblended seismic data models and the blending matrix; adding a final updated residual to a final updated deblended seismic data model to obtain the deblended seismic data, each trace of the deblended seismic data relates to a seismic response at a detector position to acoustic energy generated by one of the two or more sources at a source position; and using the deblended seismic data in generating an image of the subterranean formation, thereby enhancing the image of subterranean earth layer layers.