Same as for Fig. 3, but for an EUV brightening without a signature in either IRIS SJI filter. A clear structure is evident in the HRI_EUV images. The automatically detected EUV brightening (outlined by the cyan contours) is detected where two almost perpendicular arms appear to meet. Neither the arms nor a transient point-like brightening at the location of the EUV brightening are apparent in the IRIS SJI filter data. An animation of this region is available online.