Photospheric motion analysis for the sunspot of AR13468 (region E) where coronal loops are seen to connect. The top panel shows the trajectories of corks from time t = 0 and over the full dataset duration (1 hour and 46 min). The corresponding $\overline{v_h}$-distribution and Fourier spectra along each trajectory are shown in the middle and bottom panels respectively in the same format as in Fig. 5.