How fast does the Earth's inner-core rotate compared to the Earth's daily rotation?
The inner core is always described as a spinning/rotating solid core while the Earth has a single revolution per day. I've always imagined it as a fast spinning top, but realised I don't actually know if it is a faster spin or slower spin when compared to the Earth's rotation.
And even if I knew the speed (which I don't), a number doesn't mean anything unless compared to something relatable.
So how much faster/slower is the core rotation compared to the 24 hour day rotation?
Eg the inner core rototes 25 or 2.5times per 1 day. Or the inner core rotates 0.5 times per 1 day.