Mastodawn

The rotation of Earth's inner core has slowed, new study confirms
A new study provides clear evidence that Earth's inner core began to decrease its speed around 2010
https://www.sciencedaily.com/releases/2024/06/240613161147.htm

* implications for Earth’s surface speculatative
* backtracking of inner core may alter length of a day by fractions of a second

Inner core backtracking by seismic waveform change reversals
https://www.nature.com/articles/s41586-024-07536-4

The new study provides unambiguous evidence that the inner core began to decrease its speed around 2010, moving slower than the Earth's surface.

ScienceDaily