Slice at x=−1.25 Mm for the time t=489.3 s, showing the density of charges. The in-plane magnetic field lines are overplotted by blue lines. The point with a high density, situated at y=0 and z=0.6 Mm, is marked by a blue dot, being the same point marked in Figure 3 above, and in Figure 6 below for the panels on the second row, for a better visualization. The line along the cut used in Figure 8 below is indicated by a dashed orange line.