Horizontal magnetic field at three different times during the eruption phase. The horizontal component B_y of the magnetic field, almost parallel to the PIL, is defined by the color code. Arrows and electric current density contours are the same as in Figure 4. The animation begins at ﹩t=164{t}_{A}﹩ and ends at ﹩t=244{t}_{A}﹩.

(An animation of this figure is available.)

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