Time-evolution of (a) the kinetic and magnetic energies $E_u^S$ and $E_b^S$, (b) the dipolar energy fraction f_dip, and (c) the mean radial magnetic field on the outer sphere 〈 b_r〉_S, for a MHD simulation with Ek=2 × 10⁻⁶, Ra_C=2 × 10¹⁰, Ra_T=1.67 × 10⁹, Pr=0.3, Sc=3, Pm=0.2, and Δ R=0.5. Mean values are marked with horizontal dotted lines; The vertical dotted line at t=0.53 t_η shows the time at which the snapshots are shown.