Why You (Probably) Shouldn’t Worry About Earth’s Magnetic Poles Flipping
By Jeanna Bryner, Live Science Managing Editor | February 1, 2018 10:17am ET
https://www.livescience.com/61603-what-if-magnetic-pole-reversal.html
"But this bar magnet is no Olympic gymnast: The flipping isn't a quick turn but rather a gradual one, and can take between 1,000 and 10,000 years. "It's not a sudden flip, but a slow process, during which the field strength becomes weak, very probably the field becomes more complex and might show more than two poles for a while, and then builds up in strength and [aligns] in the opposite direction," Monika Korte, the scientific director of the Niemegk Geomagnetic Observatory at GFZ Potsdam in Germany, previously told Live Science."