This "flip" happens every 11 years, and coincides with the greatest solar activity in the "cycles" of the sun, known as "solar maximum" - with sunspots and "coronal mass ejections" on the surface of the sun.
"It looks like we're no more than 3 to 4 months away from a complete field reversal," says solar physicist Todd Hoeksema of Stanford University. "This change will have ripple effects throughout the solar system."
The effects are so powerful they will be felt beyond Pluto .... http://uk.news.yahoo.com