Fig. 4
a The response curves of the Zyx component at site M23 when the lower limit of C1 was varied. b The response curves of the Zxy component at site M03 when the lower limit of C2 was varied. Each symbol in the a and b represents the model response when Dmax is varied. The values in parentheses are the RMS misfit values for the model. c The model with a thin conductive brick (Ca) corresponding to the sill-like pressure source (top depth at 1.5 km). d The response curves of the Zyy component at site M07 when the bulk resistivity value and the thickness of Ca were varied