Same as for Fig. 3, but for a more complex EUV brightening. Multiple small EUV brightenings are returned by the algorithm throughout this time in the HRI_EUV images, outlined by the cyan contours. A small point-like brightening develops in the Mg II channel co-spatial to the HRI_EUV activity, whilst a well-defined structure is evident in the Si IV filter. This structure includes two spiral arms that are most clearly observed in the fourth column. An animation of this region is available online.