Will aliens cause a Pole Shift?

In the 2012 pole shift theory is about the magnetic pole, he is currently in northern Canada. The magnetic polemoves continuously. But not only that - he turns around and then sometimes it is called a pole shift.

The earth's magnetic field is in fact not stable, it varies continuously in intensity. On the basis of lava flows andother geologic studies, a recurrent and dismantling of the magnetic field, to the almost complete halt of the magnetic field direction of the magnetic and exchanging evidence. It is assumed that the magnetic field by rotating the liquid iron in Earth's interior is. If this rotation would cease, the earth's magnetic field would subside.