Treasury of Scripture Knowledge
And lightning flashes and [loud] sounds of rolling thunder came out of God's throne. And there were seven lighted torches burning in front of the throne, which are the seven Spirits of God [i.e., the Holy Spirit. See 1:4].
Then the angel took the incense holder and filled it with hot coals from the Altar and threw it to the earth. [Immediately] there was [heard] rolling thunder, and lightning flashes [were seen] and an earthquake [was felt].
Then God's Temple in heaven was opened, and inside of it was seen the Chest containing God's Agreement [i.e., between Him and Israel]. [Immediately] there came lightning flashes, [loud] sounds, rumbling thunder, an earthquake and a severe hailstorm.
At that very hour a severe earthquake occurred and one tenth of the city [See verse 8] was destroyed; and seven thousand persons were killed by the earthquake; and everyone else was terrified and gave honor to the God of heaven.