The seven trumpets are instruments that are used by seven angels who will rise upon God's order and sound the coming of the end from these seven trumpets. Seven trumpets are sounded, one at a time, to cue apocalyptic events that were seen in the vision of the Revelation of Jesus Christ, by John of Patmos.
The seven trumpets are sounded by seven angels and the events that follow are described in detail from Revelation Chapters 8 to 11. According to Revelation the angels sound these trumpets after the breaking of the seventh seal. These seals secured the apocalyptic document, that was in the right hand of Him who sits on the main throne.
Upon the first trumpet sound, hail and fire, mixed with blood, is thrown to the Earth burning up a third of the trees on the planet, and all green grass.
By the second trumpet sounding, it cues something like a great burning mountain that plunges into the sea and wipes out a third of all sea life and ships. A third of the oceans will become blood.
By the sound of the third trumpet, a great star called Wormwood falls to the Earth poisoning a third of the planet's freshwater sources, such as rivers and springs. Men will die from drinking its bitter taste.
Following the sounding of the fourth trumpet, a third of the light that shines from the Sun, moon and stars became dark from these celestial bodies being "struck". This catastrophe caused complete darkness for a third of a day, during the day, even through night hours.
The fifth trumpet sound is the "first Woe" of three. Before this trumpet sounds, an angel (translated eagle in some versions) appears, flying in mid-heaven, and warns, "Woe, woe, woe, to those who dwell on the earth, because of the remaining blasts of the trumpet of the three angels who are about to sound!"
The fifth trumpet prompts a personified star to fall from heaven. The star is given the key to the bottomless pit. After opening it, the smoke that rises out, darkens the air and blocks the sunlight. Then from out of the smoke, the Locusts were unleashed.
They were scorpion tailed warhorses, having a man's face with lion's teeth. Their hair was long like that of a woman's and flew with locust-like wings. They were crowned with golden crowns and protected with iron-like breastplates. They were commanded by their king, Abaddon, to torment any man who does not have the seal of God on their forehead, by using their scorpion-like tails. It was also made clear to them that they must not kill anyone during their five-month mission of torment.
Five months after the fifth trumpet blast, the sixth one sounds. This is the "Second woe", where four angels are released from their binds to the "great river Euphrates". They command a brute force of 200 million mounted troops whose horses dissipate plague from out of their mouths, most notably: fire, smoke, and brimstone. The mounted horsemen wore breastplates with the color of fire, hyacinth, and brimstone. The horses had a lion's head and their tails were like a serpent, even with a snake head. They are responsible for the deaths of a third of mankind who are stricken by the plague that emanated from these armies.
The sound of the seventh trumpet signals the "Third woe". This is the final trumpet sound and the final woe. Loud voices in heaven proclaim Christ as ruler forever and ever under the "Kingdom of our Lord". Thanks is given to God, the Almighty and praise for the wrath that came, the dead who were judged, and the bond-servants rewarded. The temple of God in heaven then opened and the Ark of the covenant appeared in His temple. Then lightning and peals of thunder occurred followed by an earthquake and a great hailstorm.