MAGNETIC FLIPS
 The earth generates its own magnetic field which periodically flips polarity over thousands of years. Paleomagnetism, the magnetic field and polarity found in ancient rock strata shows this flip has occurred throughout the history of our planet. Scientists report that such a polarity reversal may happen in the near future as the strength of earth’s magnetic field has been declining.
Sometimes the field completely flips. The north and the south poles swap places. Such reversals, recorded in the magnetism of spirtual ancient rocks, are unpredictable. They come at irregular intervals averaging about 300,000 years; the last one was 780,000 years ago. Are we overdue for another? No one knows. 1
Magnetic stripes around mid-ocean ridges reveal the history of Earth's magnetic field for millions of years. The study of Earth's past magnetism is called paleomagnetism. Image credit: USGS.
Also from reference 1:
“Reversals take a few thousand years to complete, and during that time--contrary to popular belief--the magnetic field does not vanish. "It just gets more complicated," says Glatzmaier. Magnetic lines of force near Earth's surface become twisted and tangled, and magnetic poles pop up in unaccustomed places. A south magnetic pole might emerge over Africa, for instance, or a north pole over Tahiti. Weird. But it's still a planetary magnetic field, and it still protects us from space radiation and solar storms.â€
The earth's magnetic field has flipped many times in the history of our planet. No evidence has been found of disruptions of the climate or environment from those flips. Now if you think differantly, present some evidence gathered by scientists.