Azimuthally averaged toroidal magnetic field ${\overline{B}}_{\varphi }(\varpi ,z)$ from one cycle (∼3 years) of MHDr3*. The poloidal magnetic field is represented with arrows, where the width is proportional to the strength of the field. The values of ${\overline{B}}_{\varphi }$ are clipped to ±50 kG, and the maximum and minimum values $({\overline{B}}_{\varphi }^{\min },{\overline{B}}_{\varphi }^{\max })$ are indicated below the colorbar. The dashed line at z = 0 represents the equator. The complete temporal evolution of ${\overline{B}}_{\varphi }$ is available as an online movie.