Luke 21:11
And great earthquakes will happen, and at various places there will be famines and disease epidemics. And there will be fearful events and great [supernatural] signs from heaven.
Matthew 24:29
"But immediately after the terrible trouble of those days, [i.e., the next major event on God's calendar], the sun will become dark, and [therefore] the moon will not [be able to] shed its [reflected] light. The stars will fall from the sky and the forces of the heavens will be shaken [Note: From the description of these same events in Luke 21:25-26, it is possible that this is figurative language for great calamities happening on the earth].
Luke 21:25-26
"Then [Note: This event answers to the "immediately" of Matt. 24:29, and suggests the next major event on God's calendar] there will be [supernatural] signs [evident] in the sun and moon and stars. And on earth [there will be] distress among nations; they will be perplexed by the roaring of the ocean's churning waves. [Note: Probably this is figurative language for highly agitated conditions on earth].
Mark 13:24-25
"But after those days of terrible trouble [i.e., the next major event on God's calendar will be], the sun will become dark, and [therefore] the moon will not [be able to] shed its [reflected] light,
Acts 2:19-20
And I will display miracles in the sky above and [supernatural] signs on the earth below [consisting of] blood, fire and smoky vapor.
Revelation 6:12-17
Then I looked as the Lamb broke open the sixth seal, and there [I saw] a great earthquake; the sun turned as black as sackcloth made out of [goat] hair, and the entire moon turned [as red] as blood.
Revelation 18:9
And the kings of the earth, who committed sexual immorality with her, and indulged in luxurious living with her, will cry and mourn over her when they see the smoke of her burning [i.e., the city of Babylon. See verse 2].
Revelation 18:18
and called out as they watched the smoke of the burning [city], 'What city was ever as great as this one?'