(a) Emergence and (b) cancellation images viewed in the xz-plane, at t = 25 time steps. Left: closed (magenta) and open (blue) magnetic field lines; right: logarithm of LOS-integrated current. An animation of this figure from time step 0 to 60 is provided online.

(An animation of this figure is available.)

The video/animation of this figure is available in the online journal.