Inversion maps of magnetic field quantities for both Event B snapshots. From left to right: line-of-sight magnetic field strength (with positive/negative (i.e. red/black) corresponding to field oriented towards/away from the observer), horizontal magnetic field strength, and azimuth for Event B1, followed by similar maps for B2. As only one node was used in azimuth, the corresponding maps are identical for the three heights shown. The panels have been scaled by column to the same values for both B1 and B2 to facilitate comparison of the time evolution between them.