How do the magnetic field lines sustain themselves as the coronal mass ejection flies away from the Sun?
1 Answer
The Earth's magnetic field is constant however the lines of magnetism are swept back by CMEs(Coronal Mass Ejection).
Explanation:
http://blogs.egu.eu/network/geosphere/2013/03/15/guest-post-solar-storms-and-the-earths-protective-shield-laura-roberts-artal/
The figure above illustrates the Earth's magnetic field during a CME.
http://mysteriousuniverse.org/2016/05/earths-magnetic-field-is-weakening-and-we-dont-know-why/
The figure above shows the magnetic field normally.