Figure 11

The Osnabr\(\ddot{{u}}\)ck self-potential anomaly, Germany. (a) Observed and calculated SP anomaly profile. (b) Derivatives of the observed SP anomaly. (c) Analytic signal amplitude. (d) Image (R-max = 0.9976 at q = 1.2, \(\theta\) = \(-97^{\circ }\), \(z_o\) = 23 m and \(x_o\) = 250 m).