The filament channel and its relation to other field structures. Panel a: field lines corresponding to the original filament channel (gray) together with field structures involved in the proposed reconnection process (see Fig. 8). The filament field lines were started in the north. Panel b: AIA 131 Å image taken at 09:36 UT showing the original filament. Panel c: filament field structure on top of the AIA image from panel b. Panels d and e: filament field structure on its own from a top-down and side-on perspective. Panel f: extended filament structure revealed by a larger seed source at the same location. Panel g: relation of the extended filament structure to the same field lines as in panel a.