"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." Rev 4:5

William R. Newell described "thunderings, voices and lightnings" as powers of nature made intelligent to man in judgment.  He further expounded that "the seven lamps of fire ... which are the seven Spirits of God" as the complete active discernment of all matters and affairs in judgment.  Hence, the Holy Spirit then is taking the role in governmental administration and not as the Comforter of saints and as the Revealer of Christ to sinners as of now.

The throne then is no longer the throne of grace as of now, but of judgment
Thunderings - Awakening to Judgment
Voices - Attention on Judgment
Lightnings - Apprehension of Judgment

Seven Seals judgment - thunderings (Rev 6:1)
Seven Trumpets judgment - voices (Rev 8:5, 11:15)
Seven Vials judgment - lightnings (Rev 11:19)