Current density vectors in a volume subset close to the null point region, at the center of the simulation box. Right column shows a view along the fan plane, positive X-axis, while the left column shows a view along the spine plane, positive Y-axis. Arrows show the vector direction, the color code its amplitude and the size of the arrows the relative strength of the currents. Also shown are the spine and fan field lines, colored by the amplitude of the currents, together with the Z component of the magnetic field at the bottom of the simulation box.
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