Earth's inner core periodically rotates at a different speed than the mantle, appearing to reverse.
the verdict
SUPPORTED
the evidence backs this
confidence 78/100
Seismological studies of repeating earthquakes support the phenomenon that Earth's inner core rotates differentially relative to the mantle and can reverse its relative speed over decades.
Evidence for · 2
Inner core backtracking by seismic waveform change reversals.
2024 · cited by 2
Wang and Song (2024) compile repeating earthquakes demonstrating that Earth's inner core super-rotated from 2003 to 2008 and then sub-rotated back through the same path.
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More for · 1
Nature of inner-core temporal changes and a precise estimate of differential inner-core rotation rate
2021 · cited by 0
Wang et al. (2021) provide precise seismic evidence supporting the differential rotation of the inner core and its temporal fluctuations.