At the opening of the seventh seal,
Revelation 8:1 And when he had opened the seventh seal, there was silence in heaven about the space of half an hour.
seven angels had seven trumpets given them.
Revelation 8:2 And I saw the seven angels which stood before God; and to them were given seven trumpets.
Another angel putteth incense to the prayers of the saints on the golden altar.
Revelation 8:3 And another angel came and stood at the altar, having a golden censer; and there was given unto him much incense, that he should offer [it] with the prayers of all saints upon the golden altar which was before the throne. Revelation 8:4 And the smoke of the incense, [which came] with the prayers of the saints, ascended up before God out of the angel's hand. Revelation 8:5 And the angel took the censer, and filled it with fire of the altar, and cast [it] into the earth: and there were voices, and thunderings, and lightnings, and an earthquake.
Four of the seven angels sound their trumpets, and great plagues follow.
Revelation 8:6 And the seven angels which had the seven trumpets prepared themselves to sound. Revelation 8:7 The first angel sounded, and there followed hail and fire mingled with blood, and they were cast upon the earth: and the third part of trees was burnt up, and all green grass was burnt up. Revelation 8:8 And the second angel sounded, and as it were a great mountain burning with fire was cast into the sea: and the third part of the sea became blood; Revelation 8:9 And the third part of the creatures which were in the sea, and had life, died; and the third part of the ships were destroyed. Revelation 8:10 And the third angel sounded, and there fell a great star from heaven, burning as it were a lamp, and it fell upon the third part of the rivers, and upon the fountains of waters; Revelation 8:11 And the name of the star is called Wormwood: and the third part of the waters became wormwood; and many men died of the waters, because they were made bitter. Revelation 8:12 And the fourth angel sounded, and the third part of the sun was smitten, and the third part of the moon, and the third part of the stars; so as the third part of them was darkened, and the day shone not for a third part of it, and the night likewise. Revelation 8:13 And I beheld, and heard an angel flying through the midst of heaven, saying with a loud voice, Woe, woe, woe, to the inhabiters of the earth by reason of the other voices of the trumpet of the three angels, which are yet to sound!