Revelation 6:11-15

And a white robe was given to each of them; and they were told that they were to rest for a little while longer, until the number of their fellow servants and their brothers and sisters who were to be killed even as they had been, was completed also. The Sixth Seal: Terror

And I looked when He broke the sixth seal, and there was a great earthquake; and the sun became as black as sackcloth made of hair, and the whole moon became like blood;

and the stars of the sky fell to the earth, as a fig tree drops its unripe figs when shaken by a great wind.

The sky was split apart like a scroll when it is rolled up, and every mountain and island was removed from its place.

Then the kings of the earth and the eminent people, and the commanders and the wealthy and the strong, and every slave and free person hid themselves in the caves and among the rocks of the mountains;