Fig. 7

Test results obtained by inversion of synthetic data for four specifically designed models. a Results for a model with two anomalies of 5 % high and 5 % low amplitude paralleling on either side the NTF; b same as a but anomalies elongated in direction perpendicular to NTF; c a single 4 × 2 cells large anomaly (5 % velocity increase) crossing from region of highest resolution into poorly resolved region; d two 2 × 2 cells (one of 5 % increased and one of 5 % decreased velocity). In all cases, the input model is shown in red and/or blue line regard to its negative and positive contrast of 5 %, related to the initial 1D velocity model, respectively. Gray triangles show stations and black solid lines illustrate the faults strand; White border shows RDE line of 0.1 and light gray area masks cells which rays hit