What is the meaning of Revelation 16:18?

* The two F.O.G. Bibles & Commentary below are currently a work in progress.

And there were flashes of lightning, and rumblings, and peals of thunder, and a great earthquake the likes of which had not occurred since men were upon the earth—so mighty was the great quake.

Berean Standard Bible (BSB)

There were lightnings, sounds, and thunders; and there was a great earthquake, such as was not since there were men on the earth, so great an earthquake, so mighty.

World English Bible (WEB)

And{G2532} there were{G1096}{(G5633)} voices{G5456}, and{G2532} thunders{G1027}, and{G2532} lightnings{G796}; and{G2532} there was{G1096}{(G5633)} a great{G3173} earthquake{G4578}, such as{G3634} was{G1096}{(G5633)} not{G3756} since{G3739}{G575} men{G444} were{G1096}{(G5633)} upon{G1909} the earth{G1093}, so mighty{G5082} an earthquake{G4578}, and so{G3779} great{G3173}.

Strong's King James

(18) There was lightnings, voices, thunders and there was a a great earthquake, the sort as never been from when mankind became upon the land, so great an earthquake and so great!

The F.O.G*

[18] Lightning flashed, thunder crashed, and voices roared. A massive earthquake unlike any since human creation shook the earth—the most powerful convulsion of the planet ever witnessed.

The F.O.G Paraphrase

and there came voices, and thunders, and lightnings; and a great earthquake came, such as came not since men came upon the earth, so mighty an earthquake—so great!

Young's Literal Translation