This bi-polar trend is caused by the wanton, (in China Won-Ton) use of electric motors. Yes, Earth-Raper, every time you turn on your electric toothbrush, you are adding to the problem by creating a stray magnetic field which causes direct harm to women, gays, members of minority groups, and children, who will suffer most when the poles flip, which will surely happen before Bush is impeached, if we don't act quickly.
Thank God (if there is one) that Al Gore and John Kerry are on this alarming environmental disaster.
Notice how the magnetic pole data on this site looks so strangely similar to the global warming data.
http://gsc.nrcan.gc.ca/geomag/nmp/long_mvt_nmp2_e.php
I buy only reverse turning motors. The reversal cancels out some small effect of normal motors.
The plants in my house sense the neutral polarity atmosphers and grow like hell. The air is ion free and all my pets are positively glowing with good circulation and improved cognitive ability.