List of Footnotes

1 For an animation of a coronal mass ejection (CME) causing a substorm and aurora, see External Link
2 In the following, we assume observations close to the disk center for simplicity, when the vertical and LOS-component are identical. For observations far away from the disk center one has to resolve first the ambiguity and apply coordinate transformations from LOS/transverse to vertical/horizontal fields afterwards.
3 Solar Optical Telescope Spectro-Polarimeter