The article mentions that a thing could change the core magnetic stuff, which deflects cosmic rays, and triggers other changes that in two weeks percolate up to

The article mentions that a thing could change the core magnetic stuff, which deflects cosmic rays, and triggers other changes that in two weeks percolate up to an earthquake. This is a statistical finding, needs a theory to explain. I mean it could be some weird trajectories in a chaotic fluid flow of liquid iron in the core that causes both.