Uh, I don’t know how to say this but the whole solar cycle occurs precisely because the Sun’s magnetic field polarity flips every 11 years or so. This polarity flip has already occurred 24 or so times since the sunspot cycle was first tracked beginning in the late 1600s. As far as solar science is concerned, these polarity flips are the norm.

As for the Earth’s magnetic field, it also flips, but this occurs about once every 100,000 years or so, not every 11 years. There is evidence now, a slight but definite decline in the strength of the field over the past 100 years, that another flip is building, but it is a slow process that takes several thousand years.

Based on this information, there is really no connection between the two.

I wrote about this nearly five years ago for ScienceNOW: http://news.sciencemag.org/physics/2010/09/say-goodbye-sunspots