According to this report, the Earth's inner core can stop and change direction:
As a former aspiring planetary physicist, I have always wondered how this could be possible.
The structure of the Earth which we mere mortals can readily observe, the crust, is rotating at a regular rate. The inner core, which is quite massive and possesses significant angular momentum, is coupled in some way to the crust, via the mantel and inner core. If any part of the whole were to accelerate or decelerate with respect to the rest, wouldn't the rotation rate of the surface also change?
These "scientists" need to come up with a better explanation.
Update - 1/27/2023
Here is additional discussion:
If the inner core's rotation cycles with a periodicity of 6 or 70 years, wouldn't the motion of the crust reflect this?
Are we really supposed to believe the only interaction between the inner core and the rest of the planet is via magnetic fields?
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