Angels blow six trumpets
Six of seven angels with trumpets blew them, and they were accompanied by signs on the earth.
Key passages
Re 8:2–9:21

And I saw the seven angels who stand before God, and seven trumpets were given to them. And another angel who had a golden censer came and stood at the altar, and a large amount of incense was given to him, in order that he could offer the prayers of all the saints on the golden altar that is before …