Running difference SDO/AIA 171 Å images on 2013 May 22 rotated with the solar west up showing (a) outward-propagating QFPs from the primary flare and (b) counter-propagating QFPs (apparently along trans-equatorial loops) from the primary flare on the left and the secondary flare on the right. (An animation of this figure showing the running difference images from 12:40 to 14:20 UT is available online.)

(An animation of this figure is available.)

The video/animation of this figure is available in the online journal.