Scientists who just months ago revealed the inner core had reversed its spin have discovered another bombshell.
Scientists who just months ago confirmed that Earth's inner core recently reversed its spin have a new revelation about our planet's deepest secrets — they identified changes to the inner core's shape.Scientists now have evidence that the planet's innermost layer is changing shape.
"We can compare the signals that we see when the inner core is returned to the same position as it was in some other time and see if there's differences that can't be explained by the rotation," Vidale, Dean's Professor of Earth Sciences at the University of Southern California's Dornsife College of Letters, Arts and Sciences, told CNN.
Amplitude changes in a type of core-penetrating P wave — PKIKP waves — hinted at deformations in the inner core's shallowest level, according to the new study. At the boundary where the solid inner core meets the liquid of the outer core, the sphere's surface might be more malleable than it is at deeper levels.
Amplitude changes in those paired waves could then be assigned to shape changes in the core, rather than rotation changes, according to the study. However, what that deformation of the inner core might look like is harder to pin down.
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