Overview figure showing the location of AR NOAA 12418 on 16 September 2015. Left column, top to bottom: Full-disk images in HMI I_c, B_z, GONG Hα, AIA 304 Å, and AIA 171 Å. Middle column: magnification of the black rectangle (371 Mm × 186 Mm) in the left column. The HMI I_c has been exchanged for the derived temperature instead. Right column: magnification of the black rectangle marked in the middle column (94 Mm × 70 Mm). Lower three panels: Hα line-core intensity and velocity, and the continuum intensity from the IBIS high-resolution spectra. The white dashed line in the Hα velocity map marks the symmetry line of the sunspot. The GONG Hα image in the middle column is not de-projected in contrast to all other panels in the right two columns. The red and blue arrows mark examples of Hα filaments as opposite to IEF channels.