Electric field in the x–z plane for times t = 0.6, 6, 12, 18, 24, and 30 ms. The right column shows a zoomed-in view of the panels in the left column. Each row shows a different instance in time as indicated in each panel. The positions of the probes (cf. Fig. 3) in the x–z plane are indicated in panel b. The sun is to the right, and the magnitude of the convective electric field E_conv = 0.85 Vm⁻¹ is indicated on the colour scale. All electric fields are shown in the comet frame of reference.