The first hint that Earth's core goes its own way came in 1996. The core appeared to be turning 1 part in 100,000 faster than the surface. That small difference would case it to drift by 10s of kilometers a year -- a big effect by geophysical standards. #Core #Earth
https://www.nature.com/articles/382221a0.epdf?sharing_token=5xPux_kso-lj1l3NjlRFn9RgN0jAjWel9jnR3ZoTv0Pe9hYJxuR3zx3EdSy70FV2DzRj9KRzhn-7w43yopcXfHoSch9ZYS4IjI3xG5Zl5dGIWiZW63RBYgX2BHlnqy_ohP4tSH8vKVHB4U8VR1ux4XDc_4MU_ouCQEd3bDPO5a1Pi0AKD5Py9bYlZ0faKYO7xl8vwwW42klG_2miffz1EQ%3D%3D&tracking_referrer=www.sciencenews.org
Earth's inner core is solid, but the outer core is liquid. That means the inner core is suspended in liquid, like the insides of a chocolate-covered cherry, leaving it weirdly free to move around. #Core #BeFree