Figure 6

Model 3: regional anomaly’s impact. (a) Composite SP anomaly of sphere model and first-order regional calculated by expression (6). (b) Derivatives. (c) Amplitude. (d) Image.

Model 3: regional anomaly’s impact. (a) Composite SP anomaly of sphere model and first-order regional calculated by expression (6). (b) Derivatives. (c) Amplitude. (d) Image.