The sun's magnetic flips every 11 years or so; the sun spot activity rises and earth gets blasted by the associated EM activity. Much less frequent, but known to occur around every 10,000 years, magnetic flips of the earth are also able to be detected. As you all probably know by now, I'm putting forward some threads on a new theory of how photons may have a chemistry similar to atoms; similarly, there may be photonic states and photonic compounds. IF true, then these magnetic flips may be due to the photon states changing across state 'boundaries'; as the energy density say within the sun changes incrementally it may rise or fall above or below Balmer-like but continuous photonic spectrographs associated with the photonic states. In this case, the sun or the earth change their spin state and change to cause the balance of energy contained within Maxwell's equations (or its strong force equivalent) to be maintained. Because the energy density of the sun is much more variable than any one planet, the magnetic flips occurring within the sun's fields occur much more frequenctly than earth's.