An Approach to Model Earth Conductivity Structures with Lateral Changes for Calculating Induced Currents and Geoelectric Fields during Geomagnetic Disturbances

Figure 8

Induced current density at different depths obtained from a 3D FEM calculation. The magnitudes of the currents are different in the different regions. The flowing paths show that the directions of currents change at the interface between the different conductivity structures. Also the skin effect can be seen from the current values.