The First Trumpet
The seventh seal is the seven trumpet plagues.
Revelation 8:1 And when he had opened the seventh seal, there was silence in heaven about the space of half an hour. 8:2 And I saw the seven angels which stood before God; and to them were given seven trumpets.
8:3 And another angel came and stood at the altar, having a golden censer; and there was given unto him much incense, that he should offer it with the prayers of all saints [who are fervently praying “Your Will be done, your Kingdom come”] upon the golden altar which was before the throne. 8:4 And the smoke of the incense, which came with the prayers of the saints, ascended up before God [These prayers, just like the smoke of the burnt offering, picture wholehearted faithfulness and zeal to follow God and to learn and keep the whole Word and Will of God; which is a very pleasant smell like the perfume of incense to God the Father] out of the angel’s hand.
8:5 And the angel took the censer, and filled it with fire of the altar, and cast it into the earth: and there were voices, and thunderings, and lightnings, and an earthquake. 8:6 And the seven angels which had the seven trumpets prepared themselves to sound.
A great hail storm with extensive lightening falls on much of the earth, causing many fires which burn up most of the earth’s forests and grass lands.
The lightening will be accompanied by enormous awesome fear generating thundering around much of the earth, and the lightening generated fires would be expedited by the previous long drought and holding back of rainfall. The fires would not be limited to growing things but would also undoubtedly consume many buildings as well.
The hail and lightening would be mingled with the blood of the many people being struck by great hail and lightening, and being burned in the fires.
8:7 The first angel sounded, and there followed hail and fire mingled with blood, and they were cast upon the earth: and the third part of trees was burnt up, and all green grass was burnt up.
This is the beginning of the wrath of a furious Jesus Christ, pouring out His anger upon a rebellious mankind; who have persecuted and tormented His zealously faithful and defied the Word of God.
This means EXACTLY what it says. The hail will not be just the small pea to prune sized hail that is common; it will be a very large, killer size, of many pounds in weight. The fire is doubtless lightning (Strong’s 4442 pur) and the blood, is the blood of those injured, dead and dying.
The Second Trumpet
8:8 And the second angel sounded, and as it were a great mountain burning with fire was cast into the sea: and the third part of the sea became blood; 8:9 And the third part of the creatures which were in the sea, and had life, died; and the third part of the ships were destroyed.
This is likely a huge meteor burning brightly as it passes through the atmosphere.
While not specifically mentioned here, it should be self evident that such a massive and forceful displacement of water would result in a huge tsunami or tidal surge, which would be very damaging to large areas of land as well as to the sea. The size of such a massive object, its effect multiplied by its great speed at impact, would easily create a unprecedented sloshing series of tidal waves sweeping across many coastal land masses and would certainly destroy all shipping in the affected area.
With much shipping destroyed and quite likely many oil tankers crushed, this might be the Exon Valdez disaster multiplied a thousand or more times. A vast; heavy coat of oily sludge and pollution over the sea, glinting in the sun, might just be described as looking like a sea of blood and would kill of all sea life in that area.
Whether this means just the Mediterranean Sea or all the oceans is unclear. In either case, this will still be an awesome disaster.
The Third Trumpet
8:10 And the third angel sounded, and there fell a great star from heaven, burning as it were a lamp, and it fell upon the third part of the rivers, and upon the fountains of waters; 8:11 And the name of the star is called Wormwood [bitter]: and the third part of the waters became wormwood [bitter, poisoned]; and many men died of the waters, because they were made bitter.
This appears to be in the nature of a comet, which is made of dust and frozen gasses which would glow like a lamp on entry into the atmosphere, as opposed to the more solid nature of a meteor. This dust falling over a wide area of fresh waters, would pollute those waters and making them bitter and poisonous. A glowing comet is also much brighter than a meteor and passes over a much longer distance in the atmosphere.
The Fourth Trumpet
8:12 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.
There is to be an eight hour period, half during the day and half during the night, when the natural light from the skies will be obscured on the surface of the earth.
The exact cause of this is not revealed but this darkness is to be regarded as an ominous warning of the three trumpet woes to come; the last [the seventh trumpet] of which brings the resurrection of the chosen and includes the seven last plagues falling on the earth during the marriage of the Lamb in Heaven. See The Marriage of the Lamb
8:13 And I beheld, and heard an angel flying through the midst of heaven, saying with a loud voice, Woe, woe, woe, to the inhabiters of the earth by reason of the other voices of the trumpet of the three angels, which are yet to sound!