James White does a study on the Seven Trumpets of Revelation which seems to agree overall with the historical or the view of the events as already happening to be finished with the final trumpet as seen in his "THE SOUNDING of the SEVEN TRUMPETS of REVELATION 8 AND 9."
http://www.adventtimes.com/content/7TRUMPETS.pdf but as I already mentioned the timing of the First Trumpet varies.
We also have a very good study by SDA theologian Jon Pauline:
INTERPRETING THE SEVEN TRUMPETS
by Jon Paulien
A paper prepared for the
Daniel and Revelation Committee
of the General Conference of SDAs
Presented in Berrien Springs, MI
March 5-9, 1986
".......The First Trumpet
"The first angel sounded his trumpet; with the result that hail and fire mixed with blood were flung to the earth. A third of the earth, a third of the trees and all the green grass were burned up."
Rev 8:7
Parallels in Revelation
7:1-3 11:19
8:5 14:18
9:4 16:21
11:5 20:10,14,15
Old Testament Allusions
Reasonably Certain
Ezod 9:23-26 Ezek 38:22
Isa 10:16-20 Zech 13:8-9
Ezek 5:1-4
Moderately Certain
Exod 7:17ff. Isa 30:30
Deut 32:22 Jer 11:16-17
Ps 18:13 Jer 21:12-14
Ps 80:8-11,15,16 Ezek 15:6-7
Ps 105:32 Ezek 20:47-48
Isa 28:2 Joel 2:30-31
Symbolic Concepts (Echoes)
Hail Earth
Fire Trees
Blood Grass
Contemporary Literature
4 Ezra 5:8 in context
Sib Or V:376-378
Wis Sol 16:16-24
New Testament Allusions
Reasonably Certain
Matt 3:10
Luke 12:49
Luke 23:28-31
Uncertain
Rom 8:20ff.
1 Cor 3:13-14
Jude 11-12
Exegetical Meaning
In the first trumpet John draws on the imagery of God's judgments on Egypt (Exod 9:23-26), Assyria (Isa 10:16-20), Gog (Ezek 38:22) and Jerusalem (Ezek 5:1-4). It is clear that the language of the first trumpet describes an act of God's judgment against a power that opposes Him. In the OT these judgments were covenant related, thus could be turned on God's own people when they broke the covenant (Deut 32:15-22). The later prophets, especially, applied the hail and fire of God's judgments more and more to Israel and Judah (Ps 80:8-16; Isa 28:2; Jer 11:16,17; 21:12-14; Ezek 15:65,7; 20:47,48).
In the OT, hail and fire symbolized weapons of God's wrath used in judgment on His enemies (Exod 9:23-26; Job 38:22; Ps 18:13; Isa 10:16-20; 28:2; 29:1-6; Jer 21:12-14).(47) Blood symbolized violently destroyed life (Gen 9:5,6; 1 Kgs 2:5; Ps 79:3; Mic 3:10). The earth symbolized the habitable portion of the planet, and in contrast to the sea, the land of Israel itself (Isa 28:2; Lev 26: Jer 9:10-12). Fresh grass was a symbol of God's people while dry grass portrayed the fate of evildoers (Isa 44:3,4; Ps 37:1,2). Fruitful trees were particularly associated with the faithful followers of Yahweh (Ps 1:3; 52:8; 92:12,13; Isa 61:3) while dry or wild vegetation symbolized the unfaithfulness of Israel (Isa 5:1-7; Jer 2:21; Ezek 15:6,7; 20:47,48; Hos 10:1).(48)
In Revelation, as in the OT, hail and fire are associated with heavenly things and with God's judgments on His enemies (Rev 16:21; 20:10,14,15) and the enemies of His people (8:5; 11:5). Greenery is also a symbol of God's people who are usually protected by His seal (7:1-3; 9:4). Thus the greenery here represents followers of God who are not protected and thus have probably forsaken the covenant. The thirds are best understood as portions of Satan's kingdom which has three parts (Rev 16:14,19).(49)
Thus the first trumpet portrays a judgment of God, in response to the prayers of the saints, which falls on a portion of Satan's kingdom that may once have given allegiance to God's kingdom. Do we have any idea with whom the readers of the Apocalypse would have identified this judgment? In Matt 3:10 trees were a symbol of fruitless Jews who had rejected John the Baptist's message and thus were exposed to the fire of Messianic judgment that Jesus would pour out (Matt 3:12; Luke 12:49). In Luke 23:28-31 Jesus applied the imagery of dying trees to the destruction of Jerusalem. If a righteous man such as He can be treated as He was what will be the fate of a rebellious and wicked nation, who crucifies its redeemer? These NT references make it virtually certain that John intended his readers to see in the first trumpet the fate of the Jewish nation that had rejected Jesus as its Messiah.
The Second Trumpet
"The second angel sounded his trumpet; and something like a great mountain burning with fire was flung into the sea. A third of the sea became blood, and a third of the creatures that were in the sea, who have souls, died, and a third of the ships were destroyed."
Rev 8:8-9
Parallels in Revelation
6:12-17 17:16
12:12 18:8,9,18
16:4-6 18:17-19
17:1-3 18:21
17:9 18:24
Old Testament Allusions
Reasonably Certain
Gen 1:20,21
Exod 7:19-21
Exod 19:16-20 Ps-J
Jer 51:24,25,41,42
Moderately Certain
Ps 46:2-3
Isa 10:16-18
Symbolic Concepts
Mountain Blood
Fire Sea Creatures
Sea Ships
Contemporary Literature
1 Enoch 18:13-16 2 Baruch 10:1-3
1 Enoch 21:3-10 2 Baruch 11:1
1 Enoch 108:4-6 2 Baruch 67:7
4 Ezra 3:1,2,28-31 Sib Or V:143,158,159
4 Ezra 13:21-24
New Testament Allusions
Matt 21:21
Matt 13:47-50
Luke 5:1-10
Luke 21:25
Exegetical Meaning
While the burning mountain might have brought the eruption of Vesuvius in 79 AD to the first century mind, the second trumpet is built primarily on the Old Testament. Gen 1:20,21 is the source of the language with which the author describes the fish that are destroyed in the sea. The bloody water and the dead fish are reminiscent of the plagues on Egypt (Exod 7:19-21). The Pseudo-Jonathan Targum to the Penteteuch causes one to suspect that John may have had the theophany on Sinai in mind as he wrote here (Exod 19:16-20 Ps-J). The most significant Old Testament allusion in the second trumpet is the reference to Jer 51. Just as the Euphrates River is the means by which the original Babylon fell, so the sea here swallows up another Babylon. In Isa 10:16-18 the reference is to the fall of Assyria. While the Old Testament background of the first trumpet suggests that the plague falls on a power that once followed God but has now broken the covenant, the Old Testament background to the second trumpet points to a judgment on Gentile nations rather than an apostate Israel.
As with the first trumpet, there are six symbolic concepts in Rev 8:8,9. A mountain can symbolize a nation (Isa 13:4; Jer 51; Isa 10), God's throne (Isa 2:2,3; 14:12-14; Ezek 28:14) or an obstacle to faith (Zech 4:7-10). Of the three the first is the most relevant to the context of the second trumpet. Fire, as in the first trumpet, is a symbol of violently destroyed life. In 1 Enoch (18:13-16; 108:4-6) the burning of a mountain indicates that it is subject to God's judgment as was the case with the mountain of Babylon in Jer 51. The sea is most likely to be understood in terms of nations in opposition to God (Isa 57:20; 17:12,13; Jer 51:41,42; cf. Rev 13:1ff.; 16:12; 17:15). Sea creatures are a symbol of people (Ezek 29:5; Hab 1:14). The destruction of fish is symbolic of God's judgment upon evildoers (Hag 4:3; Zeph 1:3). Ships are symbolic of the sources of a nation's wealth and its pride in being able to take care of itself (Ezek 27:26; 2 Chr 20:37; Isa 2:16). The destruction of ships leads to economic chaos resulting in the humiliation of that nation (Rev 18:17-19).
In Revelation "great mountain" clearly points to ancient Babylon as a symbol of the end-time opposers of Christ and His people (17:1-3,9; 18:21). This end-time Babylon is symbolically destroyed by fire as was the first (Rev 17:16; 18:8,9,18). The fact that there is only one mountain in Rev 8:8 and seven mountains in Rev 17:9 indicates that this plague does not fall on the end-time Babylon of Rev 17 but on a preliminary manifestation of that Babylon.(50) The blood in the second trumpet probably represents a reversal of the persecution of God's people by the wicked (cf. Rev 16:4-6; 18:24). They receive in kind for what they have done. The sea appears to be a reference to the Euphrates, the waters of Babylon (9:14; 16:12; 17:1,15). In summary, the second trumpet is a judgment of God, in response to the prayers of the saints, which falls on an enemy of God's people. This enemy is represented by a great burning mountain which is identified with ancient Babylon.(51) In judgment God burns the mountain and casts it into the sea of wicked nations, resulting in economic and commercial chaos for the ancient world.
Do we have any idea with whom the readers of the Apocalypse would have identified this judgment? It was common in first century Judaism to use Babylon as a cryptic reference to Rome.(52) Would John have been likely to do the same? Matt 21:21 relates the moving of mountains to Christian faith. A mountain is any power that opposes the establishment of Jesus' kingdom. In Luke 21:25 the unruly sea represents the wicked nations of the world in an unsettled state. In Luke 5:1-10 and Matt 13:47-50 the fish of the sea represent individuals to whom the gospel is preached. Thus the symbols are used similarly to the OT but in a Christ-centered context.
The mountain facing Jesus and His disciples in Matt 21 was the opposition of the Jewish nation to Jesus. By the time Revelation was written a far larger mountain had erected itself in the path of Christ's kingdom, Rome. Rome was not the end-time Babylon for John, but its persecution and ridicule hindered the preaching of the gospel and tempted many Christians to apostatize from the faith. Given the weight of evidence it is likely that a first century reader would understand the second trumpet as a prediction that the Roman Empire was soon to fall along with its entire social order. Although the Empire was used by God as the executor of His covenant on the Jewish nation, its hostility toward Christ and his people, and its persecution of them called for its ultimate downfall. When that time came it would apparently be as the result of universal revulsion. She would sink beneath the waves of a sea of nations. The result would be the devastation of the whole economic and social order.
The Third Trumpet
"The third angel sounded his trumpet; and a great star burning with fire fell out of heaven. It landed on a third of the rivers and springs of water. The star's name was called "Wormwood." A third of the waters became wormwood with the result that many men died from the waters because they had been made bitter.
Rev 8:10-11
Exegetical Meaning(53)
The main symbolism of the third trumpet revolves around the great falling star and the rivers and springs which it defiles. The falling star is particularly reminiscent of the Lucifer account (Isa 14:12-15) and the activity of the little horn (Dan 8:10,11) in the Old Testament. In both texts there is the attempt to usurp God's authority. In Isa 14 the falling of the star is the punishment for Lucifer's activity, in Dan 8 it is the result of the little horn's persecuting activity.
Rivers and fountains, when pure, are sources of life in the Old Testament (Deut 8:7,8; Ps 1:3). Thus they became symbols of spiritual nourishment (Ps 36:8,9; Jer 17:8,13; Prov 14:27; Ezek 47:1-12). Impure fountains, on the other hand, would have the opposite spiritual effect (Prov 25:26). Bitter water cannot sustain life and growth.
Wormwood and bitterness are associated together in Lam 3:15,19. In Deuteronomy wormwood represents anyone who turns away from Yahweh into idolatry (Deut 29:17,18). In Jeremiah it symbolizes the punishment Yahweh was planning to mete out because of Judah's apostasy (Jer 9:15: 23:15). The Marah experience is also a close parallel to the third trumpet (Exod 15:23). The children of Israel were dying of thirst. With great anticipation, they approached the spring-fed oasis of Marah only to find that there was no life in the bitter water.
Other parts of the New Testament also contain parallels to the third trumpet. In Luke 10:18 Satan is the one who fell from heaven. Similar imagery is used in Rev 12 where the dragon's tail sweeps a third of the stars of heaven to earth before being thrown to the earth himself (Rev 12:3,4,9). In the Gospel of John "living" spring water is a symbol of what Jesus brings to the believer through the Holy Spirit (John 4:10-14; 7:37-39).
What was John trying to say with by means of these images? The overwhelming flavor of this account is one of apostasy. Stars and fountains are positive images in Scripture but here John drew on passages such as Isa 14 and Deut 29 where a good thing becomes evil due to apostasy. The little horn of Dan 8 also encourages apostasy in its usurpation of the sanctuary service. Such apostasy is the first step on the road to spiritual death in that it results in a distortion of the source of spiritual nourishment, the Word of God. Through distorted views of God the Scriptures are made of no effect in giving life to the people.
The early church was aware that apostasy loomed large in its future (Acts 20:28-31; 2 Thess 2; 1 Tim 4:1ff.). It was also aware that pure doctrine can only be maintained with diligent effort (1 Tim 4:1,2; 1 John 4:1-3; Jude 3,4). The message of the third trumpet underlines these convictions. The removal of Rome and Judaism as effective opponents would have seemed to open the way for the church's advancement and growth. But John warns in apocalyptic language that such a removal only diverts Satan's attack. He then will concentrate on destroying the church from within, knowing that if the church's life-giving message can be subtly distorted, mankind will fail to find the spiritual nourishment it needs, but instead will find only bitterness. Indications that this iniquity was already at work in John's lifetime are found in New Testament books such as 1 Corinthians, Galatians, Colossians and Hebrews.
The Fourth Trumpet
"The fourth angel sounded his trumpet; and a third of the sun, moon and stars were smitten with a plague, resulting in a third of them being darkened so that a third of the day did not shine and the night likewise.
Rev 8:12
Exegetical Meaning
There is an apparent contradiction in this verse. The plague smites a third of the sun, moon and stars with darkness, which one would expect to result in a dimming of the intensity of the heavenly lights. Instead a third of the day and a third of the night are darkened as in an eclipse. Since the latter is more sound grammatically, the plague probably points to a darkening of the heavenly bodies for a third of the time.
This passage is strongly based on the darkness of the ninth plague on Egypt (Exod 10:21-23) and the lamentation over Pharaoh in Ezek 32:2-8. Darkness is one of the curses of the covenant (Deut 28:29). The sun is a symbol of the Word of God in the Old Testament (Ps 19; 119:105). The moon represents beauty and fertility (SS 6:10; Deut 33:14). Stars represent angels and the people of God (Dan 8:10; 12:3). The choice of symbolism points to a partial obliteration of the Word of God resulting in spiritual darkness.
John seems to be pointing to an attack on God's word and His people that is of a different nature than that of the third trumpet. While wormwood represented a distortion of the Word of God the fourth trumpet results in the obliteration of that word. It is no longer visible. In the third trumpet people continued to drink from the springs, hoping to gain life, in the fourth trumpet the very presence of the life-giving sources is removed.
John seems to be pointing to a new power which would oppose the truth and the people of God in a more direct way. Perhaps the model for such a power can be found in the Pharaoh of the Exodus, who denied the very existence of Yahweh (Exod 5:2). It is difficult to know what kind of movement John would have had in mind, likely he was pointing to something completely new.
There is a seeming contradiction in that the trumpets are judgments of God on the enemies of His people, yet the third and fourth trumpets seem to be attacks on the gospel and those who proclaim it. But God's judgments come in two forms in the Bible. There is the judgment of open intervention as in 2 Kgs 19 where 185,000 Assyrians were slain. Similar is the sending of Cyrus to defeat Babylon in order to free Israel. On the other hand, as in Rom 1, God's judgments often come in the form of permitting people and nations to reap the consequences of their own actions (cf. Hos 4:17). Thus, while the direct enemies of the church are removed in the first two trumpets, God permits an apostasy which results in two new enemies, one from within and one from without. In its apostasy the church, as with Judaism, becomes an enemy of God's true people.
Transition
"I saw and heard a vulture flying in mid-heaven saying with a loud voice, "Woe, woe, woe to those who live on the earth because of the rest of the trumpet sounds belonging to the three angels who are about to blow their trumpets."
Rev 8:13
The vulture is a symbol of God's covenant judgments (Hos 8:1; Ezek 32:4; Hab 1:8). God is moving to attack those who are spiritually dead as a result of the apostasy. The three woes indicate that the worst is yet to come. Now that the darkness has been unleashed, all the powers of darkness are freed to torment humanity until the end. For John, the road to the Parousia is a downhill road to destruction apart from Christ...."