Keywords: 420px-Magnetic-rope.png The self-constricting magnetic field lines and current paths in a Birkeland current or magnetic rope The current is strongest at the axis and becomes weaker further away Currents flow parallel to the magnetic field and derives partly from an external axial field and partly from the toroidal field produced by the current itself Image credit http //history nasa gov/SP-345/ch15 htm 250 and arrows coloured by myself Other Versions <gallery> Image Magnetic rope svg Colored SVG Image </gallery> PD-USGov Field diagrams Images uploaded at reduced resolution Original upload log wikitable - - 2005-11-01 02 31 45 420 × 600 23359 bytes Perpetual <nowiki>The self-constricting magnetic field lines and current paths in a Birkeland current or magnetic rope The current is strongest at the axis and becomes weaker further away Currents flow parallel to the magnetic field and derives partly from an external</nowiki> |