Overview of observed target on 2013 January 20. Panel a: detailed view of active region NOAA 11658 at 17:35:55 UT observed in the EUV at λ304 Å. The sunspot is located in the middle of the FOV. The solid yellow box indicates the FOV of IBIS and the dashed yellow box indicates the FOV of ROSA. Both contain the targeted extended AFS. Panel b: averaged magnetogram between 14:00 UT and 22:00 UT. Panel c: schematic overview of NOAA 11658 with the moat cell (MC) of the moat flow around the sunspot, an MMF in the moat cell, and arch filaments (AF) along a supergranule (SG). The arrow indicates the propagation direction of the MMF.