Fig. 4.From: On wind-driven electrojets at magnetic cusps in the nightside ionosphere of MarsThe secondary current density in the Y direction, j y2 (top), and the ratio of the secondary to primary current densities in the Y direction, j y2 /jy (bottom). The direction of the secondary Y currents is the same as the primary Y currents leading to an enhancement in the current density.Back to article page