Is Revelation Chronological?

I personally believe that Revelation is chronological insofar as the trumpets are subsequent to the seals, for the 7 angels aren't given the 7 trumpets until after the 7th seal has been opened (Revelation 8:1-2, 6-7), and insofar as the vials are subsequent to the trumpets; they could come out of the 7th trumpet's temple opening (Revelation 11:15, 19; 15:5-6).

I believe that the two witnesses could be alive during the same 1,260 days (Revelation 11:3) that the Antichrist will rule (Revelation 13:5), so that chapters 11 to 14 could be read as a unit -- all together they could describe the events of the Antichrist's rule.

I believe that the rapture must come after the entire tribulation (Matthew 24:29-31), including the 7 trumpets and the 7 vials, for when the rapture comes the Antichrist is destroyed (2 Thessalonians 2:1, 8). The Antichrist isn't destroyed before the tribulation, nor at the 6th seal, nor at the 7th trumpet, for he gathers his armies after the 6th vial (Revelation 16:12 16), and is destroyed at the 2nd coming (Revelation 19:19-20), which I believe is after the 7 vials (Revelation 16). This is why between the 6th and 7th vials, Jesus exhorts us to hold on (Revelation 16:15). I believe this is the same blessing as Daniel 12:11-12, and that we will have to wait 1,335 days from the abomination of desolation until Jesus returns.

I believe that each of the seals, trumpets, and vials brings a different event. Comparing the 1st seal (Revelation 6:2), 1st trumpet (Revelation 8:7), and 1st vial (Revelation 16:2), note that there's no correlation between the events.

Comparing the 2nd seal (Revelation 6:4), 2nd trumpet (Revelation 8:8-9), and 2nd vial (Revelation 16:3), note that there's no correlation between the 2nd seal and the 2nd trumpet. While there's some correlation between the 2nd trumpet and the 2nd vial insofar as they both affect the sea, I believe these are separate events because at the 2nd trumpet only 1/3 of the sea turns to blood, while at the 2nd vial, at the end of the tribulation, the entire sea turns to blood.

Comparing the 3rd seal (Revelation 6:5-6), 3rd trumpet (Revelation 8:10-11), and 3rd vial (Revelation 16:4), note that there's no correlation between the 3rd seal and the 3rd trumpet. While there's some correlation between the 3rd trumpet and the 3rd vial insofar as they both affect the waters, I believe these are separate events because at the 3rd trumpet only 1/3 of the waters are turned into wormwood by a star falling from heaven, while at the 3rd vial, at the end of the tribulation, all the waters are turned into blood by an angel pouring out a vial.

Comparing the 4th seal (Revelation 6:7-8), 4th trumpet (Revelation 8:12), and 4th vial (Revelation 16:8), note that there's no correlation between the 4th seal and the 4th trumpet, and the 4th vial affects the sun in the opposite manner as the 4th trumpet.

Comparing the 5th seal (Revelation 6:9-11), 5th trumpet (Revelation 9:1-11), and 5th vial (Revelation 16:10), note that there's no correlation between the 5th seal and the 5th trumpet. While there's some correlation between the 5th trumpet and 5th vial insofar as they both bring darkness and pain, I believe these are separate events because the 5th trumpet doesn't mention the kingdom of the beast and the 5th vial doesn't mention the locusts.

Comparing the 6th seal (Revelation 6:12-17), 6th trumpet (Revelation 9:13-19), and 6th vial (Revelation 16:12), note that there's no correlation between the 6th seal and the 6th trumpet. While there's some correlation between the 6th trumpet and the 6th vial insofar as they both refer to the Euphrates, I believe these are separate events because the 6th trumpet refers to the army of horseman as being of the four angels in the Euphrates and they slay 1/3 of mankind, whereas the 6th vial refers only to the kings of the east and it doesn't say they slay anyone, but are most likely slain by Christ (Revelation 19:21).

Comparing the 7th seal (Revelation 8:1-2), 7th trumpet (Revelation 11:15-19), and 7th vial (Revelation 16:17-21), note that there's no correlation between the 7th seal and the 7th trumpet. While there's some correlation between the 7th trumpet and 7th vial insofar as they both refer to an earthquake and great hail, I believe these are separate events because the 7th trumpet doesn't mention Babylon (Revelation 16:19), and the 7th vial doesn't mention the opening of the temple in heaven (Revelation 11:19), out of which opening I believe the 7 vials subsequently come (Revelation 15:5-6).

*******
6th Trumpet = 6th Vial?

Note that it doesn't say the Euphrates dries up at the 6th trumpet or that the army of the 6th trumpet crosses the Euphrates.

Note that the army of the 200 million horseman of the 6th trumpet are of the four angels in the Euphrates (Revelation 9:15-16) whereas the 6th vial refers only to the kings of the east and doesn't refer to an army or to horseman or to any number (Revelation 16:12).

Note that the army of the 200 million horseman of the 6th trumpet slay 1/3 of men (Revelation 9:15, 9:18) whereas the 6th vial doesn't say the kings of the east slay anyone, but are most likely slain by Christ (Revelation 19:21).

Isn't Armageddon the gathering together of all the armies of mankind to fight Jesus at his return (Revelation 16:14-16; Revelation 19:19)? Why would the kings of the east slay 1/3 of men (Revelation 9:15, 9:18) right at the time they're trying to unite all men to fight Jesus?

*******
6th Seal = 7th Vial?

Some believe the 6th seal and 7th vial are the same because they both mention earthquakes, but notice that an earthquake also happens right before any of the trumpets begin to sound (Revelation 8:5-6). Do they then believe that this also is the same earthquake? While both the 6th seal earthquake and the 7th vial earthquake refer to the mountains and islands, these are probably not the same event, for notice how differently they describe what happens to the mountains and islands. At the 6th seal they are simply "moved [ekin�th�san] out of their places," no matter how slightly, while at the 7th vial the islands "flee away [ephugen]" and the mountains "are not found [heureth�san]." Imagine a moderate earthquake in your own home which moves everything in your home out of its place by an inch or so. Now imagine a cataclysmic earthquake which causes everything in your house to flee away to the point where you can't find anything after the earthquake. These would be 2 very different scenarios.

*******
How Long For the 7 Trumpets?

Some say the 7 trumpets will begin and end in machine gun fashion. But how do they understand the 5th trumpet lasting "five months" (Revelation 9:1, 10), and the separation in time of the 3 "woes" of the last three trumpets? (Revelation 8:13, 9:12, 11:14) If the 6th and 7th trumpet can't begin until the woe from the 5th trumpet is "past" (Revelation 9:12), and the woe from the 5th trumpet lasts 5 months, why do they believe the 7 trumpets will happen in machine gun fashion?

*******
Seals Heaven's View & Trumpets Earth's View?

Note that John sees what happens on the earth during the vials (Revelation 6:8, 13-14).

*******
4th Seal = 4th Trumpet?

Note that there's no correlation between the 4th seal and the 4th trumpet:

"And when he had opened the fourth seal, I heard the voice of the fourth beast say, Come and see. And I looked, and behold a pale horse: and his name that sat on him was Death, and Hell followed with him. And power was given unto them over the fourth part of the earth, to kill with sword, and with hunger, and with death, and with the beasts of the earth" (Revelation 6:7-8).

"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 8:12).

Note that nothing says or requires that the 4th seal be 3.5 years into the tribulation, or that the 4th seal include persecution, or that the persecution of Matthew 24:9-13 couldn't begin before the abomination of desolation of Matthew 24:15.

Because of Daniel 12:11-12, I believe that from the abomination of desolation until Jesus comes we'll have to wait 1,335 days, and that Matthew 24:22 is saying if it went much longer than that nobody would survive.

*******
The Lord's Day

I believe that in Revelation 1:9-10 John is simply saying that he was on the Isle of Patmos in a spiritual trance (compare Acts 10:10, 11:5, 22:17) on a Sunday (compare Acts 20:7; 1 Corinthians 16:2).