Can anyone predict the Tangshan earthquake in history?

1976 before the Tangshan earthquake, in the suburbs of Tangshan, a 70-year-old grandmother had a clear premonition that the sky was going to fall. She is a little woman who has never been to school and doesn't even know the word earthquake.

On the afternoon of the earthquake, she came to the home of the party branch secretary of the brigade and begged strongly: It's ominous tonight, and the sky is going to fall. I don't know how many people will die. Don't sleep in it, your family. Why don't you come out and hide? choose

Of course, the party branch secretary did not believe this sudden remark and criticized: nonsense is typical these days. Are you in trouble? Choice?

The old lady doesn't care at all, but she is still good at persuading the bad. Finally, she simply knelt on the ground and pleaded: I am an old man, and I have never told a lie in my life. Today is really going to collapse, and no one can escape. I'm begging you, just trust me once. If you don't move out, it will be too late tomorrow morning.

Seeing that she is so serious, the branch secretary thought: Don't listen this time, if something really happens, you will escape; It's nothing. The most is to go out for a night and suffer a little. The old lady persuaded the battalion chief in the same way. That night, only three of them moved out of the whole brigade.

The next morning, a devastating earthquake happened. The whole village was in ruins. There are only three survivors.

Why did the old lady predict the earthquake? If it is a special function, what is the principle?