Butterfly diagrams of the axisymmetric, azimuthally averaged magnetic component ⟨B_r⟩_ϕ at the outer boundary. (a) N_ρ = 2, Ra/Ra_cr = 32; (b) N_ρ = 6, Ra/Ra_cr = 16; and (c) N_ρ = 6, Ra/Ra_cr = 32. To highlight large-scale components, the color maps were saturated with cutoffs of 0.2, 0.25, and 0.1, respectively; the magnitude of magnetic fluctuations is larger by a corresponding factor. Black curves correspond to the surface dipolarity with cutoff parameter of l_cut = 11 (4).