https://www.sciencenews.org/article/earth-inner-core-superionic-matter-weird-solid-liquid
Towards the bottom of the article it mentions the rotation difference could result from hydrogen, oxygen, and carbon “flowing” amongst the iron and silicon atoms primarily making up the inner core. The swirling is thought to change distribution of iron and silicon atoms.
The article does discuss secondary and primary waves in the core in a general way, but it makes sense these could contribute to plate tectonics if able to coherently find a way past the mantle.
Thanks!
John Keebaugh
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