Overview images showing AR 11865 shortly before (top panels) and during (bottom panels) observations. The first two panels of each row show the HMI continuum intensity and line-of-sight magnetic field (values are clipped at ±1500 G), respectively. The last two panels are AIA filtergrams taken in the 1600 Å and 171 Å channels. They are displayed on logarithmic scale and a reversed intensity scaling is used. The times listed in the upper right corner of each panel correspond to the midpoint of the particular HMI or AIA exposure time. The light-blue and orange contours represent the umbrae of opposite polarity within the δ-spot. The green rectangle outlines the full field-of-view of the TIP-II instrument. The red square shows the area displayed in Figs. 6, 7, and 9.