The Holy Bible, Ezekiel 38:18-20
18 And it shall come to pass at the same time when Gog shall come against the land of Israel, saith the Lord God, that my fury shall come up in my face.
19 For in my jealousy and in the fire of my wrath have I spoken, Surely in that day there shall be a great shaking in the land of Israel;
20 So that the fishes of the sea, and the fowls of the heaven, and the beasts of the field, and all creeping things that creep upon the earth, and all the men that are upon the face of the earth, shall shake at my presence, and the mountains shall be thrown down, and the steep places shall fall, and every wall shall fall to the ground.
The Holy Bible, Revelation 16:16-20
16 And he gathered them together into a place called in the Hebrew tongue Armageddon.
17 And the seventh angel poured out his vial into the air; and there came a great voice out of the temple of heaven, from the throne, saying, It is done.
18 And there were voices, and thunders, and lightnings; and there was a great earthquake, such as was not since men were upon the earth, so mighty an earthquake, and so great.
19 And the great city was divided into three parts, and the cities of the nations fell: and great Babylon came in remembrance before God, to give unto her the cup of the wine of the fierceness of his wrath.
20 And every island fled away, and the mountains were not found.
The Doctrine and Covenants, Section 45:48
48 And then shall the Lord set his foot upon this mount, and it shall cleave in twain, and the earth shall tremble, and reel to and fro, and the heavens also shall shake.
The Doctrine and Covenants, Section 49:23
23 Wherefore, be not deceived, but continue in steadfastness, looking forth for the heavens to be shaken, and the earth to tremble and to reel to and fro as a drunken man, and for the valleys to be exalted, and for the mountains to be made low, and for the rough places to become smooth-and all this when the angel shall sound his trumpet.
The Doctrine and Covenants, Section 88:87-91
87 For not many days hence and the earth shall tremble and reel to and fro as a drunken man; and the sun shall hide his face, and shall refuse to give light; and the moon shall be bathed in blood; and the stars shall become exceedingly angry, and shall cast themselves down as a fig that falleth from off a fig tree.
88 And after your testimony cometh wrath and indignation upon the people.
89 For after your testimony cometh the testimony of earthquakes, that shall cause groanings in the midst of her, and men shall fall upon the ground and shall not be able to stand.
90 And also cometh the testimony of the voice of thunderings, and the voice of lightnings, and the voice of tempests, and the voice of the waves of the sea heaving themselves beyond their bounds.
91 And all things shall be in commotion; and surely, men’s hearts shall fail them; for fear shall come upon all people.
Journal of Discourses, Orson Pratt 18:7
And when they have fulfilled their prophecy, then the nations that have been lying before Jerusalem so long, waiting for an opportunity to destroy the city, will succeed in killing these two Prophets… But by and by, right in the midst of their rejoicing, when they think the Jews will now certainly fall a prey to them, behold there is a great earthquake, and in the midst of it these two Prophets rise from the dead, and they hear a voice up in the heavens saying–”Come up hither;” and they immediately ascend in the sight of their enemies. What next? Notwithstanding all this, those nations will be so infatuated, and so determined to persecute the people of God–as much so as Pharaoh and his army in ancient days–that they will say–”Come, now is the time to pitch into the Jews and destroy them.” And they will commence their work of destruction, and they will succeed so far as to take one half the city, and while they are in the very act of destroying Jerusalem, behold the heavens are rent, and the Son of God with all the heavenly hosts appears, and he descends and rests upon the summit of the Mount of Olives, which is before Jerusalem on the east. And so great will be the power of God that will then be made manifest, that the mountain will divide asunder, half going towards the south, and half towards the north, producing a great valley going east and west, from the walls of Jerusalem eastward.