Inner core wobble

Scientists from China have substantiated the presence of an Inner Core Wobble (ICW) lasting approximately 8.5 years, observed in both polar motion and length-of-day variations. This discovery unveils a static tilt of roughly 0.17 degrees between the Earth's inner core and mantle, challenging conventional assumptions and offering valuable insights into the Earth's internal dynamics and density distribution. The identification of this Inner Core Wobble provides a new dimension to our understanding of the intricate movements and relationships within the Earth's core and mantle, fostering advancements in the field of geophysics.