SDO/AIA images showing the evolution of the C8.7 flare in EUV: 131 Å filter (a, d, g), 171 Å (b, e, h), and 304 Å (c, f, i). N2 and N3 give the positions of negative sunspots; LS is the large supergranule; S is the bright sigmoid formed over the filament F; PRH and NRH in (f) are ribbon hooks. The tiny white crosses show the border of the half dome (a and b), the arrows point to the flare kernels K1, K2 in (a–c), and K3 in (d–i), and to loops L1 and L2 in (b and e); and the white circles in (h and i) show the position of the swirl. The dotted rectangle in (d) shows the field of view in Fig. 8. The contours in (e) show RHESSI HXR sources at 06:58:34–06:59:28 UT: light blue 12–25 keV, dark blue 25–50 keV. The temporal evolution of the flare (06:45–07:45 UT) in SDO/AIA filters 131 Å, 171 Å, 304 Å, and 1600 Å is available as an online movie (aa50641_24movie_02.mpg).