Flipping the earth so east is west

"The researchers deduced this frequency using radio waves that flipped the orientation of the proton's magnet only when their frequency matched the precession frequency (arxiv.org/abs/1104.1206v1)."

http://www.newscientist.com/article/mg21028094.200-lonely-spunout-proton-reveals-magnetic-secret.html

The forces involved are not massive ......