D&C 43

To the early saints, the Lord taught -

"For the day cometh that the Lord shall utter his voice out of heaven; the heavens shall shake and the earth shall tremble, and the trump of God shall sound both long and loud, and shall say to the sleeping nations: Ye saints arise and live; ye sinners stay and sleep until I shall call again."  (Doctrine and Covenants | Section 43:18)

As the Lord continues, it is apparent that He is referring to the day of His coming and the Millennium.  But as I read that verse, it could also refer to our day for leading to His second coming,  He speaks much of the heavens shaking with blessings in our day and our voices to be as a trump from God teaching the gospel.  There is no question that in our day, the earth trembles and the saints are to rise up and establish Zion.