Parameters of the best-fit Gaussians to the longitudinally averaged latitudinal flow (see Fig. 6). The top row shows the amplitudes A₊ and A₋, the middle row shows the peak positions μ₊ and μ₋, and the bottom row shows the standard deviations σ₊ and σ₋ of the model fits (cf. Fig. 6). The four columns show the averages over different ranges of flux, with flux increasing from left to right. The error bars are Monte Carlo estimates using quiet-Sun control regions as background noise. No model was fit when there were no inflow signatures above the noise level (see text). The filled dots (circles) and solid (dashed) lines indicate poleward (equatorward) velocity. The dotted black lines indicate the onset time of the latitudinal flow for each subsample. The gray shaded region indicates the rms in the quiet-Sun control regions.