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Differential rotation of the Earth’s inner core changes over decades and has come to near-halt

This article has been updated

Seismic observations reveal that the Earth’s inner core oscillates with a period of approximately seven decades. The multidecadal periodicity coincides with that of several other geophysical observations, particularly the variations in the length of day and the Earth’s magnetic field, suggesting dynamic interactions between the major layers of the Earth.

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Fig. 1: Multidecadal variation of the inner-core rotation and comparison with LOD variations.

Change history

  • 30 January 2023

    Text in the opening and “The observation” sections has been updated to more precisely describe changes in inner-core rotation as occurring relative to the Earth’s mantle.

References

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This is a summary of: Yang, Y. et al. Multidecadal variation of the Earth’s inner-core rotation. Nat. Geosci. https://doi.org/10.1038/s41561-022-01112-z (2023).

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Differential rotation of the Earth’s inner core changes over decades and has come to near-halt. Nat. Geosci. (2023). https://doi.org/10.1038/s41561-022-01113-y

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