Field lines from a pre-flare magnetic field reconstruction (09:36 UT) associated with the AIA 1600 Å enhancements during the C2 flare. The background consists of the HMI magnetogram in CEA projection from 09:36 UT with contours from an AIA 1600 Å image taken at 09:55:47 UT corresponding to 50, 100, and 200 counts/s. Panel 1a: all field lines with seed points within a positive polarity region. Panels 1b–1e: individual display of selected field lines. Panels 1f and 1g: combined field lines shown from two different perspectives. Panels 2a–2g: same structure but for field lines with seed points in negative polarity regions. Panel 3a: background HMI image with AIA 1600 Å contours without any field lines. Panel 3b: an AIA 131 Å image taken at 09:56 UT during the peak of the flare. Panel 3c: combined structure of all field lines displayed above the AIA image from panel 3a.