Revelation 16:18

Lightning, thunder, and the greatest earthquake this planet has ever experienced will accompany, and to some extent produce, the desolation that follows. The storm theophany again appears at the end of another series of judgments (cf. Revelation 8:5; Revelation 11:19). These are signs of divine judgment, but this earthquake is much larger than any previous one (cf. Revelation 6:12; Revelation 8:5; Revelation 11:13; Revelation 11:19; Haggai 2:6; Hebrews 12:26-27). It heralds the seventh bowl judgment and the end of the seals and trumpets judgments. All three series of judgments end at the same time.