I have seen the bottomless pit so I know that it is a volcano. We are told: "When he opened the Abyss, smoke rose from it like the smoke from a gigantic furnace. The sun and sky were darkened by the smoke from the Abyss." (Rev 9:2) So this event in 9:2 will be marked by a volcanic eruption. This sort of thing is common so the world will not pay that much attention to what is going on.
Volcanos are used to represent judgment in various parables. The bottomless pit simply represents a never changing position or law.. Never again will Satan deceive the whole world . He fell as a false identity when Jesus said it is finished.
Jewish flesh was used for a period of time as a parable to represent mankind as a whole. (Kings in Israel ) When Satan fell It lost its temporal ability to deceive all the nations that God was a respecter of persons ..The wolf in sheep clothing, faithless mankind was revealed when the earthquake and Sun was darkened. a sign to the whole world the ressurection gate was opened..
To the believers it opened the ressurection gate to all the nations of the world. Others are still crying out to the rocks having denied the father and Son.
And cast him into the bottomless pit, and shut him up, and set a seal upon him, that he should deceive the nations no more, till the thousand years should be fulfilled: and after that he must be loosed a little season. Revaltion 20:3
That thousand year clock started counting down when the veil was rent. The last days began. A time like never before or ever again .
The world found no man sitting behind the curtain called the holy of holies. Which it is was not . God does not live in temples made with corrupted human hands. That veil or curtain represented the flesh of the Son of man. From heaven it was rent from the top (70 ft) the sign of circummsion. . . the first born. A glorious moment the gospel revealed to the whole world, a spectacle the old testament saints entered in the promise of opening the graves .
Ezekiel 37:13 And ye shall know that I am the Lord, when I have opened your graves, O my people, and brought you up out of your graves,
Matthew 27:52 And the graves were opened; and many bodies of the saints which slept arose,
A sad day for those who had no faith that comes from God, having nothing of themselves that could please Him . Like Jesus said marvel but rather believe. Spread the gospel around the Jewish stone walls .They could fall .