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

Figure 7

Sketch of the 3D conductivity structure. The structure for is the Quebec model, and for it consists of two individual models: BC for and “Smaller BC” for . “Smaller BC” has the same layer thicknesses as BC but the conductivity value at each layer is five times smaller; that is, the layer conductivities are  S/m. The sizes of the computational model in three dimensions are also shown.