Scientists use a variety of techniques to measure the speed of rotation of Earth's Inner Core. One method is through the use of seismographs, which measure the vibrations caused by earthquakes. By analyzing the seismic waves, scientists can determine the speed at which they travel through the inner core.
The current estimated speed of rotation of Earth's Inner Core is approximately 1 degree every 100 years. This means that it takes approximately 400 years for the inner core to complete one full rotation.
Scientists believe that the speed of rotation of Earth's Inner Core has remained relatively constant over the past few hundred million years. However, there is some evidence to suggest that the inner core may have been rotating faster in the past.
The speed of rotation of Earth's Inner Core can be affected by a number of factors, including changes in the Earth's magnetic field, convective currents in the outer core, and the solidification and cooling of the inner core over time.
Studying the speed of rotation of Earth's Inner Core can provide valuable insights into the Earth's structure and processes. It can also help us better understand the behavior of the Earth's magnetic field and how it has changed over time.