[Mr. K]

I have a theory that the earths core runs at a different speed than the outer crust because of a meteor hit.

I can’t figure out any reason why the core would spin at a different rate.

So, if the crust moves at a different speed, then it may swing pack and forth like a garden gate door on springy hinges. It goes back and forth until the motion eventually dies out.

That would explain the magnetic poles reversing too. Along with occasional extinctions.

[Windflier]

Love your visualization of the speed of core rotation, versus crust rotation, and how those two forces interplay. Science is advanced by such thinking and ‘what ifs’.