Normalized 2D magnetic energy spectra in the xy directions (Em (kx, ky), upper panels) and in the xz directions (﹩{E}_{m}({k}_{x},{k}_{z})﹩, lower panels) from the saturation to nonlinear phase. The corresponding times are t = 12/τ0 (left), t = 15τ0 (middle), and t = 18τ0 (right), respectively.