Some journalistic exaggeration I suspect, but interesting reading: http://www.sciencealert.com/scientists-have-detected-a-crack-in-earth-s-magnetic-shield
The original scientific paper is here, for those with access: http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.117.171101
The original scientific paper is here, for those with access: http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.117.171101