We present a large-scale resistivity experiment to image a fault system down to a depth of a few hundred meters. A strong transmitter and continuous registration of potential differences is used to acquire time series on a profile of more than 2,km length. The time series' are processed in frequency domain to obtain about 300 apparent resistivities. An independent inversion reveals the course of the fault line but shows a smoothed resistivity distribution. Seismic data from a reflection survey are able to significantly improve the resistivity image by adding structural information to the inverse problem.


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