Closeup view of NOAA 12706 and its surroundings. From top to bottom: IRIS Mg II h₃, Si IV 1393 Å, and C II 1334 Å. North is up and west is to the right. The FoV has dimensions 440″ × 410″. In the Mg II h₃ it is possible to observe around the AR core the chromospheric DH made up of fibrils that have a maximum length approximately half the size of the AR in the longitudinal direction. In the C II and Si IV mosaics, instead, a halo of reduced emission is still recognizable around the AR, but less clearly and without the evident presence of fibrillar structures.