Birdwatch Note Rating
2023-01-27 18:32:22 UTC - HELPFUL
Rated by Participant: BD5BB6FCD5663287B57FD5B40C4863796063A7A17BC16686C43D8C8BE4109671
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Original Note:
The inner core rotates in the same direction as the rest of Earth, but cycles between going slightly faster or slower (<1° difference/yr) every ~35 years. This natural cycle is only known through precise geophysical study; it does not cause noticeable changes at the surface. https://www.nature.com/articles/s41561-022-01112-z https://www.washingtonpost.com/science/2023/01/23/earth-core-slowing/
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