Different measurements of inner core rotation have delivered inconsistent results. An analysis of seismic data provides a resolution of this discrepancy by suggesting decadal variations in inner core rotation rate.
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Creager, K. Variable rotation. Nature Geosci 6, 424–426 (2013). https://doi.org/10.1038/ngeo1831
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DOI: https://doi.org/10.1038/ngeo1831
