In the Book of Revelation, seven trumpets are sounded, one at a time, to cue apocalyptic events seen by John of Patmos [non-primary source needed] in his vision. 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 8:1-2, the angels sound these trumpets after the breaking of the seventh seal. These seals secured the apocalyptic document held in the right hand of Him who sits on the main throne. The trumpets are referred to in Koine Greek as σάλπιγγος (salpingos, salpinx); this was a straight, narrow bronze tube with a mouthpiece of bone and a bell; they do not resemble modern trumpets. The final three trumpets are sometimes called the "woe trumpets".
Before the invention of the brass trumpet, God had Moses make two silver Trumpets (Numbers 10:2), but the traditional sacred horn of the ancient Hebrews was the shofar made from a ram's horn[clarification needed]. The shofar had been used since Moses' day (Exodus 19:13)  to attract the attention of the Israelites, issue a signal, or to prelude an announcement and/or warning from God. Joshua had 7 priests carry seven horns for seven days and encircle Jericho seven times, then the priest sounded the horns, the people shouted and the walls came down (Joshua 6:4). In St. Paul's letter of I Thessalonians 4:16, "the trumpet of God" heralds the Second Coming of Christ.
Upon the sound of the first trumpet, hail and fire mingled with blood is thrown to Earth, burning up a third of the trees on the planet, and all green grass.
With the sounding of the second trumpet, something described as "a great mountain burning with fire" plunges into the sea and turns a third of the oceans to blood. Soon after, a third of all sea life and a third of all ships will be destroyed.  Some speculate that the "great mountain" will be an asteroid cast from the heavens.
With the sounding 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. It is unclear if Wormwood refers to a celestial object such as a meteor or star, or if it refers to an angel that will descend from the heavens.
Following the sounding of the fourth trumpet, a third of the light that shines from the Sun, moon, and stars becomes dark from the celestial bodies being "struck." This catastrophe causes complete darkness for a third of the day, even through night hours. This is the final trumpet that sounds before the three woes, also known as the fifth, sixth, and seventh trumpets.
The fifth trumpet is the "first woe" of three. Before this trumpet sounds, an angel (translated as an eagle in some versions) appears, 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 of the pit darkens the air and blocks the sunlight. Then, from out of the smoke, the locusts are unleashed. The locusts are scorpion-tailed warhorses that have a man's face with lion's teeth. Their hair is long and they fly with locust-like wings. They are adorned with golden crowns and protected with iron breastplates. They are commanded by their king, Abaddon, to torment anyone who does not have the seal of God on their forehead, by using their scorpion-like tails. It is also made clear to them that they must not kill anyone during the five months of torment. It is referenced in the Bible that the locusts are actually fallen angels taking on terrifying forms.
Robert Witham, a Catholic commentator, issued his two-volume Annotations on the New Testament, in 1733. Commenting on Chapter 9, he offers two preterist views for identifying the locusts with scorpion tails.
- The locusts may have represented the incursion of the Goths and “those barbarous People” who interrupted the Roman Empire during the time of Decius.
- The locusts may have represented the Jewish heretics who denied Christ. Most notably, Theodotus, Praxeas, Noetus, Paul of Samosata, Sabellius, and Arius.
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 force of two-hundred million mounted troops whose horses exude plagues of fire, smoke, and brimstone from their mouths. The mounted horsemen wore breastplates with the color of fire, hyacinth, and brimstone. The horses are with lion's head and their tails, as well, are like a serpent with a head. The plagues exuding from the horses will kill a third of all mankind.
The sound of the seventh trumpet signals the "third woe." This is the final trumpet and the final woe. Loud voices in Heaven will say: "The kingdom of the world has become the kingdom of our Lord and of his Messiah, and he will reign forever and ever." With the final trumpet, the "resurrection and rapture" will occur. All of those deemed worthy by God will be allowed into his kingdom, while those who are deemed unworthy will be subjected to the Seven Bowls, or "seven wraths of God." 
In Christian Eschatology, the first six trumpets are used to serve as a wake up call to the sinners on Earth and a call to repentance. Each trumpet blast brings with it a plague of a more disastrous nature than the one before it. The trumpet is used to build anticipation and tells the reader that an alert, announcement, or warning is about to take place. The seventh trumpet does not bring a plague with it. Rather, it is sounded so that glory is given to God and His kingdom is announced.
The Preterist understanding is that these blasts are like war trumpets against apostate Israel of the time period and that they correspond to events in the Jewish Wars. For example, the second trumpet is the nation of Rome depicted as a mountain, symbolic for great nations in the Old Testament, and its destruction of Galilee and the Sea of Galilee becoming full of blood and dead bodies.
Concerning the second trumpet blast, Futurist Christian apologists speculate that the "great mountain burning with fire" that plunges into the sea, in Revelation 8:8, is an impact event by a possible Near-Earth object.
Christians who follow the Posttribulation rapture doctrine, argue that the seventh trumpet is the last trumpet mentioned in I Corinthians 15:52, and that there is a strong correlation between the events mentioned in Isaiah 27:13, Matthew 24:29-31, and I Thessalonians 4:16. These parallels are used to support the doctrine of the rapture occurring after the tribulation. Therefore, Posttribulationists see the rapture happening during the seventh trumpet. The nature of the 7th trumpet shows that "time is no more, and that the mystery of God is finished, Rev. 10:6,7. At the 7th trumpet, Jesus rules and reigns forevermore, He has taken His great power and reigned, and He rewards the righteous, and judges the wicked. Both Jesus and Paul declare that when Jesus comes, His reward is with Him, and He rewards everyone according to their works, Rev. 22:12,2 Tim 4:1.
There are some scholars who describe a part from the finale from the second symphony by Gustav Mahler, as the seven trumpets, actually played by four trumpets, bass drum, cymbals and triangle, which are offstage.
- Revelation 1:9
- Revelation 1:1
- Revelation 8:1-2
- Revelation 5:1
- Barnes, A., Barnes' Notes on Revelation 9, accessed 29 October 2018
- The Jewish Study Bible, Jewish Publication Society, 2004
- Revelation 8:7
- Revelation 8:8-9
- Revelation 8:10-11
- Revelation 8:12
- Revelation 8:13
- Revelation 9:1-12
- Kenneth G. C. Newport . Apocalypse and millennium: studies in biblical eisegesis, (ISBN 0521773342, ISBN 978-0-521-77334-8), 2000, p. 85
- Witham. Annotations, vol. II, p. 463
- Revelation 9:10-12
- Revelation 9:13-21
- Revelation 11:15-19
- Koester Craig R (2001). Revelation and the End of All Things. Wm. B. Eerdmans Publishing.
- Revelation 8:8
- LaHaye, T. (1999). Revelation Unveiled (p. 167). Grand Rapids, MI: Zonervan. ISBN 0-310-23005-5 (pbk.)
- Chapman, G. W. (1996, August). Comets and Asteroids and Future Cosmological Catastrophes. Compiled from Apocalypse When by Dr. Frank Close.
- 1Corinthians 15:52
- Isaiah 27:13
- Matthew 24:29-31
- 1Thessalonians 4:16
- Revelation 11:15
- Revelation 11:17
- Revelation 11:18
- Floros, C. (1993). Gustav Mahler. The Symphonies (p. 69). Amadeus Press.