To Yang and Music, this Repeated, sluggish-shifting, barely discernible oscillation that swings forwards and backwards every single 60 to 70 a long time appears to be to point "a resonance program throughout distinctive Earth layers" – as When the World is all humming to 1, droning tune. They mentioned it https://econopass.com/news/science-technology/earths-inner-core-rotation-slows-down-what-does-it-mean/