Time-averaged (60-min) G-band images (left) of an isolated pore (top) observed on 2007 February 3 and a residual pore (bottom) observed on 2006 December 7. The arrows indicate magnitude and direction of the horizontal proper motions. Arrow with the length of the grid spacing indicate a speed of 0.5 km s^-1. Azimuthally averaged profiles (right) are presented for the time-averaged G-band intensity (solid), the horizontal flow velocities (long-dashed), the divergence (dashed), and the vorticity (dash-dotted).