Posted: Feb 02, 2011 1:39 am
Are you sure that during those reversals there are significant time-periods of low magnetic field in any locale? I was under the impression things were just kind of magnetically chaotic for a few millennia according to models, but the field remained pretty strong for the most part throughout, and I am pretty sure the magnetic field protects us more than you imply. This I can look up, but if you're pretty sure and can give quick references too, it would save me trouble. Don't go out of your way though.