Average horizontal proper motions based on LCT applied to HiFI G-band images acquired on 29 May (left) and on 6 June (right). The rainbow-colored arrows represent the direction and magnitude of the velocities. Black contours in the panel mark the pore borders. These contours are generated using GRIS continuum images. The white plus sign on both panels marks the centers of the pores around which the radial averages were taken.