Magnetograms of the B_z component at t = 100 t₀ for both the MD (A) and MD E (B) simulations. Both non-masking (left) and masking (right) magnetograms are displayed, in order to show the reduction of the region of interest for further analysis. Eruptive and non-eruptive simulations present very similar magnetograms, except near the external edge of the polarities, due to the quadrupolar geometry above the surface.