Same as Fig. 5 but for event no. 13. (a) Subregions of dimmings contoured in purple, red, cyan, and green and denoted as D1–D4. (b) and (c) Magnetic flux systems from the PFSS extrapolation from D1, D3, and D4 (panel b) and from all dimming regions (panel c). (d) and (f) Field lines sampled from NLFF extrapolations showing the flux rope (panel d, the colour indicates the local current density) and the field lines connected to the flare ribbons (panels e and f in cyan, blue and green).