Eruptive flare model. (left:) projection view of randomly plotted coronal magnetic field lines. The grayscale corresponds to the vertical component of the photospheric magnetic field B_z. (right:) photospheric bipole viewed from above. The pink (resp. cyan) isocontours stand for positive (resp. negative) values of . The yellow isocontour shows the polarity inversion line B_z = 0. (right-top:) the grayscale for B_z is the same as in the left panel. (right-bottom:) the grayscale shows the vertical component of the photospheric electric currents. Strong elongated white/black patches highlight flare ribbons. The red lines show representative post-reconnection flare loops, rooted in the flare ribbons.