SDO/HMI line-of-sight magnetograms of AR 12741 on 15 May 2019 with a 45 s time resolution. The red circles mark the small negative feature that we track to compute the moat flow speed at different times. Its evolution indicates that as it moves closer to the positive field its flux disperses and decreases. The convention for the field intensity is the same as in Fig. 1 and the images have a horizontal and vertical sizes of 150″. The online movie HMI-15May.mpeg complements this figure.