Evolution of the density integrated along the y direction around the time of the simulation when a condensation appear in the simulation. Left: Density of charges. Right: Density of neutrals. The magnetic null points are highlighted with small red circles. The point located at (–1.25,0,0.6) Mm, along the high density structure in the plane y=0, is marked for reference with green and blue, the same points highlighted in Figures 3 and 4 above.