DeathofSpeech
New Member
Duvelthehobbit666 said:Actually the magnetic field of Earth is caused by the convection of molten metal in the outer core. That is at least what I learned. Because of the changes in the convection of the molten metal in the core, we do have changes in the magnetic field and the polarity of the magnetic field of Earth. Evidence now shows that we are experiencing a change in the poles of the Earth and we know that this happened before. Is it possible that you can give me the source for your information?DeathOfSpeech said:The earth's magnetic field is caused by a big metal ball spinning inside a liquid metal outer core.
Well I appear to be a little out of step on this one don't I?
^ "Rotation and magnetism of Earth's inner core", GA Glatzmaier and PH Roberts Science, 274, 1887-1891 1996
Convection as the cause and rotation as the mechanism that aligns the dipole... with allowance for the occasional observed instability.