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“Differential rotation of the inner core was proposed as a phenomenon in the 1970s and ’80s, but it wasn’t until the ‘90s that seismological evidence was published” Dr. Lauren Waszek who ...

Located over 4,500 kilometres beneath the surface and roughly the size of the moon, the inner core’s behaviour is studied through seismic waves from earthquakes and nuclear tests. The USC ...

USC researchers identified a six-year cycle of super- and sub-rotation in the Earth's inner core, contradicting previously accepted models that suggested it consistently rotates at a faster rate ...