15. According to the Lord’s word, we tell you that we who are still alive, who are left until the coming of the Lord, will certainly not precede those who have fallen asleep. 16 For the Lord himself will come down from heaven, with a loud command, with the voice of the archangel and with the trumpet call of God, and the dead in Christ will rise first. 17 After that, we who are still alive and are left will be caught up together with them in the clouds to meet the Lord in the air. And so we will be with the Lord forever. 18 Therefore encourage one another with these words.
Revelations talks about the "second death" of which has no power over believers. The above references the dead which were "In Christ" (Believers). So the question really is, when is the first resurrection of believers?
Of course it is. Spelling correction noted by others.
Revelation 6:17, 7:1,9 -- The great day of his wrath, angels standing on the four corners of the earth, (9) the great multitude "reaped"
Revelation 14:14-16 -- Son of man coming in the clouds and "reaping" (sharp sickle in his hand)
And then there is Matthew 24:30-31 -- The Son of man coming in the clouds and "gathering" his elect from the four winds (the same four corners mentioned above)
These three accounts mention with differing perspectives the same event--the great day of Lord where he gathers his elect and judges the earth