Panel 1: visualization of h _f as a function of normalized t and z− ct for Run A: k _f/ k ₁ = 5, Re = 0.4, Re _M = 9, and Sh = 0.95. Here c = 0.6η _t0 k ₁ is the actual speed of the dynamo wave. Panels 2–4 give the z dependence of h _f, for i = x, y, and the z-component of , averaged in the comoving frame over the time of the first panel.