The seven thunders appear in Revelation 10:1–7. In his apocalyptic vision, the apostle John saw a mighty angel striding the sea and the land with a scroll in his hand. The angel gave a shout like the roar of a lion, and then the voices of the seven thunders spoke. Just as John was about to write down what they said, a voice from heaven told him to “seal up what the seven thunders have said and do not write it down” (Revelation 10:4).
The incident of the seven thunderous voices occurs in the interlude between the sixth and seventh trumpets. The seven thunders are not just the usual noise of thunder but are thunder-like voices communicating a message. The Greek word translated “thunder” means “to roar.” Thunder is often a mark of judgment in Scripture as in 1 Samuel 2:10, 2 Samuel 22:14, and several more places in Revelation (8:5, 11:19, 16:18), so these seven powerful voices are crying out for God’s judgment upon the earth. The thunder represents the voice of God.
“The Lord also thundered in the heavens, and the
Highest gave his voice; hail stones and coals of fire.” Psalm 18:13
“And out of the throne proceeded lightnings and thunderings and voices: and there were seven lamps of fire burning before the throne, which are the seven Spirits of God.” Revelation 4:5
The Seven Archangels are also referred to as the seven Spirits of God, Michael, Gabriel, Raphael, Uriel, Azrael, Raguel and Zerachiel. In the Apocryphal book of Enoch, where Michael is called the protector of Israel. The Seven Spirits have the seven characteristics of the Holy Spirit which are the Spirit of wisdom, of understanding, of counsel, of might, of knowledge and of fear of the LORD which are before the throne of God. (Isaiah 11:2).
The voice of God is depicted as thunderous rumblings that display the power, majesty and glory of the Lord. In this verse, John saw a preview of the wrath to be poured out on the earth as described in full in Revelation chapters 16—19.
Just as John was about to write the words of the seven thunders, a voice from heaven commands him to seal up what was revealed by them. The same throne that issues forth lightning and peals of thunder issues a command to keep secret what the voices have revealed. The reason for the sealing is not given, but it could be that the judgment was simply too terrifying to be recorded. Keep in mind, all of heaven was silent for thirty minutes as the Host of Heaven saw for the first time in the same manner the vision as given to John about the judgments God has in store for the planet and man.
“And when he had opened the seventh seal, there was silence in heaven about the space of half an hour.” Revelation 8:1