núcleo da terra roda mais depressa do que resto do planeta

Earth's core runs ahead of crust
US scientists claim to have confirmed that the Earth's core is spinning faster than its outer layers.
The team compared seismic waves being produced by pairs of earthquakes occurring at the same location on the planet, but at different times.
Waves from these nearly identical quakes passed through the Earth's core, they explain in Science magazine.
The results show that the inner core is rotating faster than the rest of the planet by about 0.009 seconds per year.
Earth has a solid inner core made of iron and nickel that is about 2,400km in diameter and a fluid outer core about 7,000km in diameter.