a) Total (, purple dashed), total mean (, black solid), toroidal (, blue), and poloidal (, red) rms values as functions of time as averages over the whole volume. b) in the north (blue) and south (red). The black solid line shows the ratio of the northern to southern energy as a function of time, and the orange line the mean of the ratio computed over the whole time span. c) The same for the poloidal field. d) The bottom (at R_b, blue line) and surface (at R_s, red line) toroidal magnetic field strengths as functions of time. The thin orange horizontal lines indicate the mean of the quantities over the whole simulation time. In a) and d) thick orange lines show the smoothed curve of the total mean magnetic field a) and the bottom/surface toroidal magnetic field strength d); the yellow horizontal lines show 1.1 and 0.9 times the mean levels, respectively.