How can it "probably" be related to something that almost certainly doesn't actually exist?
Because if you read the above comments, changes in the ionosphere caused by earthquakes are scientifically proven.
Ionization of the ionosphere is also what causes auroras.
Triboluminescence as another hypothesis is also proven, you can try in your kitchen with sugar!
probably because it similarly doesn't actually exist (or whatever form of it does exist has nothing to do with predicting earthquakes)