Wow! The last Magnetic pole inversion was about .78 Ma BP. Zogg was a Homo Erectus, assuming you're not talking about one of the earlier inversions. Working backwards we have Jaramillo, Cobb Mountain, then Olduvai and Reunion, but describing us as human for the last two is very iffy indeed.

Makes no difference though. The Earths orbit has been relativly stable during the Quaternery, so the above calculations remain valid, at least to about the sixth significant(+/-1) figure.