This supernatural calamity is the initiation of the great tribulation (Matt. 24:21), consisting of all the calamities, plagues, and woes from this sixth seal to the last bowl of the seven bowls (Rev. 16:17-21).
The seventh seal is the entire contents of the seven trumpets (Rev. 8:1-2). These contents are on both the negative side and the positive side.
The seventh seal, the entire contents of the seven trumpets, includes the supernatural calamities of the first four trumpets (Rev. 8:7-12).
The seventh seal also includes the three woes of the last three trumpets (Rev. 8:13—9:21; 11:14-15a, 18, 19b).
The seventh seal includes the seven plagues of the seven bowls as a part of the negative contents of the seventh trumpet (Rev. 15:7—16:12, 17-21).
The negative contents of the seventh seal, the seven trumpets, also includes the destruction of the great Babylon (Rev. 17:1—19:4) and the destruction of Antichrist and his false prophet in the war of Armageddon (Rev. 19:11-21; 16:13-16; 11:18c). The great Babylon has a religious aspect and a material aspect. The religious Babylon, the Roman Catholic Church, will be destroyed by Antichrist at the beginning of the great tribulation (Rev. 14:8; 17:16), while the material Babylon, the city of Rome, will be fallen, destroyed by God (Rev. 16:19), at the end of the great tribulation (Rev. 18:2).
The seventh seal includes the binding and imprisoning of Satan (Rev. 20:1-3).
It also includes the last rebellion of mankind and the perdition of the devil, Satan (Rev. 20:7-10).
The seventh seal includes the final judgment at the great white throne (Rev. 20:11-15). This will be an ending of all the evil matters and persons in the universe.