The Earth's magnetic field protects us from some radiation.
As the field flips, its protective effect will diminish and perhaps disappear.

Nonetheless, I seem to recall working out that you would be entirely protected from the increase in radiation that would reach the Earth's surface by remaining indoors.
(Pie of Meat ___°¬¯O¯____\o/_____/\_,____Y¯¯Y, Fri 2 Dec 2011, 13:03, 1 reply)

Some sort of hat might be in order?

( shinyshinyscalp less a man, more a way of life, Fri 2 Dec 2011, 14:48, closed)