Slipping reconnection in the Bifrost simulation. Combined, the subfigures labeled (a)–(f) show the evolution until the time t_a = 245m40s when this slipping process is complete. Each subfigure contains a top panel with an angled view of three families of 3D field lines (cyan, green, magenta), tracked by corks, above a 2D magnetogram. The angled view is angled from the bottom right corner of the 2D magnetogram toward the top left corner. On the bottom of each subfigure is a panel with only the 2D magnetogram, seen from directly above. The red circles in the bottom panels of each subfigure all highlight the same area of interest.