There was an article in a science magazine a few years ago that might give us a clue as to what's happening. And interestingly enough, it involves 2012 while having nothing whatsoever to do with Nostradamus.
There is a satellite orbiting this planet now, which is measuring the precise angle of its axial tilt. The optimum angle of tilt is 22.5 degrees, but over the millennia hat angle has been increasing. It will have increased by 12/2012, to the point where from our perspective the sun will appear to have positioned itself in the center of the Milky Way.
But the sun will not have moved in actuality. It is this planet that will have moved, or to be more specific will have increased its axial tilt to such an extent that the background of anything not on this planet will appear to have changed.
We see examples of this change of perspective every day, but we don't notice them. As an exercise, view an object and then note what is directly behind that object. Now move three feet to the right or left of where you were before, and look at that same object, again taking note of what you see behind it. Its background will have changed, but only because you yourself moved rather than its moving. The same principle will apply to our view of the sun in 12/2012.
Now with increased axial tilt comes increased stress on the planet, just as a child's top which is rotating at its optimal tilt neutralizes stress associated with its rotation, but shows notable signs of stress as its angle increases, with the largest amount of stress evident just prior to its falling over. The tectonic plates of this planet, as well as the atmosphere and sea currents, are measuring the increased stress associated with this planet's no longer being at its optimal angle of tilt, but instead its increasing that angle to what astronomers and astrophysicists consider to be its maximal tilt.
Unlike the child's top this planet will not then simply fall over. Its internal gyroscope will correct its axial tilt, returning it to the optimal tilt of 22.5 degrees. Then the process will begin again, using a 26,000-year cycle from start to finish.
But there is a problem. The gyroscope at earth's core is a self-correcting gyroscope, not a perpetual one. That means that something has to happen which causes it to correct the tilt. The old adage of, "If it ain't broke, don't fix it," applies here. The core of the planet will not correct the axial tilt until it receives confirmation that something is seriously wrong.
Again we look to the child's top. Prior to its falling over, but at the point of maximal tilt, its rotation becomes highly erratic. Instead of a smooth circular motion, we see a more elliptical motion, which eventually becomes a sideways wobble. With a child's top this simply signals the end of that rotation. With a planet that is carrying tectonic plates, atmosphere, and water at a speed of well over 1,000 miles per hour, this can mean multiple disasters (hold a glass of water in your hand and then shake it violently back and forth; that will give you an idea of what is believed to happen). And it is not until the planet reaches this point on its axial tilt that some scientists believe the earth's core will begin its corrective action.
It will be an interesting next 2 years.