In John's revelation received on Patmos, after the Seven Seals were opened, seven angels were given trumpets. With the sounding of each angel's trumpet, a devastating catastrophe fell upon the earth. This end-time prophecy begins in Revelation 8, summarized as follows:
1st angel's trump – Hail and fire mingled with blood; 1/3 of trees and all green grass burnt up. (Rev. 8:7)
2nd angel's trump – Burning mountain cast into the sea; 1/3 of the sea becomes blood; 1/3 of the living creatures in the sea die; 1/3 of the ships destroyed. (Rev. 8:8-9)
3rd angel's trump – Burning star fallen from heaven onto the rivers and fountains of waters; called Wormwood; 1/3 of the waters become wormwood and many men die from the bitter water. (Rev. 8:10-11)
4th angel's trump – 1/3 of the sun is smitten; 1/3 of the moon darkened; 1/3 of the stars darkened. (Rev. 8:12)
5th angel's trump – Star fallen from heaven to earth, given the key to the bottomless pit, opens it and smoke rises, blocking the sun and from the smoke came locusts which sting. (Rev 9:1-12)
6th angel's trump – Voice from the altar tells the angel to loose the four angels bound in the Euphrates River, to slay 1/3 of men with an army of 200,000 horsemen on fire-breathing, lion headed horses with serpent tails. The remaining men not killed by these plagues would not repent of their murders, sorceries, fornication or thefts. (Rev. 9:13-21). Note: Before the 7th angel's trump, the Two Witnesses appear.
7th angel's trump – The seven vials/bowls are poured; seven thunders; time no longer; Mystery of God is finished. (Rev. 10:1-7) Voices in heaven praise and worship God whose Temple in heaven is opened revealing the ark of the covenant; Lightning, voice, thunderings, and earthquake, and great hail. (Rev. 11:15-19)