39 used a trial-and-error method to detect the core-dimming region and found that the magnetic flux there (i.e., the toroidal flux) shows a decreasing trend, if the core-dimming region is considered the footpoint region of the CME flux rope.
1
—
—
39 used a trial-and-error method to detect the core-dimming region and found that the magnetic flux there (i.e., the toroidal flux) shows a decreasing trend, if the core-dimming region is considered the footpoint region of the CME flux rope.