Abstract
We discuss a time-lapse technique using a full nonlinear inversion scheme for subsurface monitoring purposes. In this technique we relate two measurements of the same nature but at different time instants to characterize the change of the subsurface during this time of evolution. This technique is very popular in seismic geophysical explorations. In this paper we investigate the possibility of applying this technique in monitoring of the (shallow) subsurface using electromagnetic waves at quasi static, diffusion and wave field frequencies. Some synthetic numerical examples are shown to illustrate the performance of the present technique.
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