The clouds seemed to be glowing or somewhat luminous and seemed to resemble some characteristics of the Auroras. I am not sure exactly what they were or whether they indeed had anything to do with the quake. I am no expert anyways. See if any scientists are willing to give a full explanation.

If such phenomenon can be proved for its connection with earthquake occurrences, maybe they could be used as warning signs and would be life saving. If not, just learn these clouds as yet another rare atmospheric phenomenon and no need to panic when seeing them.

After all, this might well be just a rare atmospheric phenomenon that occurred by coincidence.