Changes in the thickness, viscosity and conductivity of the outer core in the past could have led to convection patterns that caused the magnetic pole to tilt.
过去任何来自于核外层的厚度、粘性和导电性变化都会导致对流形式变化从而引起磁极倾斜。
3
The pole configuration at the S-pole side is arranged so that S-side magnet poles are coaxial to N-side core poles, and vice versa.