Extreme UV network flares observed in the quiet Sun. The top left panel shows an FSI 17.4 nm image; the white rectangle indicates the magnified HRI_EUV FOV shown in the top right panel. In this HRI_EUV image, taken at a time without network flares, the locations of four network flares are indicated. Three of these network flares are shown in the bottom row of the figure. The fourth event is shown in Fig. 17. The HRI_EUV pixels correspond to (115 km)² on the Sun (see Sect. 3.2.2).