Distribution of magnitudes of velocities (; speeds) for weak and strong magnetic fields for the times shown in Fig. 2. Red and blue colours (thick lines) describe the velocity distributions for positive and negative magnetic fields greater than 50 Gauss, whereas green and yellow (thin lines) distributions represent the motions of the weaker magnetic elements. The ranges for both the weak positive and negative field strengths are [10 < B <  50 and −50 <  B <  −10] Gauss. Here, B is the magnetic field strength as obtained from the magnetograms. The solid lines represent the positive magnetic polarity, whereas the dashed lines represent the negative magnetic fields.