Past and present CERN experiments created ultra-small "black holes" (not really holes) - or rather, super-massive matter - which were believed to have dissipated, but actually were immediately drawn toward the strongest gravitational point - the core of the Earth.

They're incredibly small but increase slowly in mass as they steadily consume surrounding atoms.

As they grow in mass, so does their gravitational pull increase, drawing inward proximal materials toward the center.

This "pulling down" effect is like an ice skater drawing in their arms and legs to increase the speed of their spin, and likewise increases the spin of the Earth and shortens the days.

It also wreaks havoc upon the Earth's magnetic field as the state of that core matter changes.

Whether it will ever reach some equilibrium, or a final state, or whether the process will continue to cascade until the Earth is squished into some small white-dwarf like orb is unknown.

For now, the effects only appear to be increasing.