Changing Earth's rotation rate

Variations of this question have been asked and answered previously but I am looking for something specific.

Situation: Earth's body (mantel and crust) rotate at different rates than it's core (I think). The Earth's core is slowly freezing out & solidifying. The difference in the rate of rotation combined with convective motion creates Earth's magnetic field.

Questions:

1. How long will it take for the core to freeze out?
2. What happens to humans when it does?
3. Are there any sudden changes in the Earth's properties (rotation, magnetic field, etc) when it happens?

Note: I imagine the core freeze process will gradually synchronize the core and body of the Earth's rotation. I also imagine that we'll see a gradual weakening of the Earth's magnetic field.

Does anyone have numbers for these things?

posted over 9 years ago

Jim2B‭

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