4 ms·
I don't understand from the article what "rotating in reverse" would mean. Referring to the crust? If it rotates around the axis just slower than the crust then
by soco 4y ago
I don't understand from the article what "rotating in reverse" would mean. Referring to the crust? If it rotates around the axis just slower than the crust then it would look from here like going on reverse. Or they mean really rotating in reverse in reference to the axis? To some normalized axis assumed stable somehow?
- giantg2 4y agoThey aren't clear, but I assume they mean the inner core would be rotating slower than the outer core and crust. In either case, the rotation would be the opposite of what it had been in relation to the outer core and crust. My understanding is that the magnetic field is a product of the interaction between the inner and outer core. I have no idea how this change would affect the field though. Just a guess.
- sliken 4y agoApparently there's evidence for increases and decreases in speed of propagation. The difference is really small, on the order of 0.1 degrees per year, which is something like 7 miles at the surface and much less at the core. Some models claims it goes from 0.1 degree faster to slower, every 35 years or so.