the rotation of Earth’s inner core has slowed; began to decrease its speed around 2010. The dance of the inner core might be even more lively than we know so far. The inner core gradually super-rotated from 2003 to 2008, and then from 2008 to 2023 sub-rotated two to three times more slowly back through the same path. The westward sub-rotation is less than half as fast as the last part of the eastward super-rotation