The background color map is the current density in the east-west (red-blue) direction of the Quasi-Dipole (QD) coordinate system. Arrows show the horizontal current density vector. Scintillation is plotted as colored dots, with a color scale capped at a value of 0.5 but dot sizes continuing to scale beyond that. Examples of dots for σ_ϕ values of 0.1, 0.5, and 1.5 are shown to the right of the map. This figure is for the same time as panel (d) in the Figures 6 and 7.