Mean values of physical parameters over the chosen SIR inversion runs on the pixels denoted with an asterisk in the last panel of Fig. 2. For all the panels blue and red represent pixels with positive and negative polarity signals, respectively. Upper left: excitation temperature variation of positive and negative polarity pixels and of the mean quiet Sun profile (black dashed line). Upper right: variation of magnetic field. Lower right: magnetic field inclination, γ, with respect to the LOS. Lower left: v_LOS. Positive v_LOS values represent redshifts and negative values represent blueshifts. The error bars represent standard deviation values.