Charles Ellicott Commentary Joel 2:10

"The earth quaketh before them; the heavens tremble; the sun and the moon are darkened, and the stars withdraw their shining." — Joel 2:10 (ASV)

The earth shall quake before them.— Some commentators call this description “a specimen of the highly-wrought hyperbolical features of Hebrew poetry,” but it is the presence and judgment, the voice of the Lord in the thunder, which causes this trepidation. The signs in the heavens will be manifested at the judgment day.