Magnetic Field Reversal

[Geaney]

I agree, being underground won't help.

Here's a clip on the subject:

http://www.youtube.com/watch?v=wMq71euHBOs

or this from National Geographic:

http://news.nationalgeographic.com/news/...field.html

In any case I'd say the term 'flip' is perhaps not the best one to use since it seems this transition can take some time.

Cheers, John