I think the 'estimates' of the timeframe are pure guesswork calculated to get a headline. It's likely the impact crater is much eariler.
As far as I know, there is no way to get a close estimate an impact site's age simply from a photograph. As far as I know, the only sign you can possibly key on is the 'look' of the edges, and guess at how much erosion has taken place. This wouldn't allow a guess to be anywhere near this accurate, unless I'm completely mistaken.
You can tell 'young' craters from 'old' craters. But you can't even guess within a few thousand years how old they may be.
I think it rather likely that the area-wide 'apocalypse' around 2300bce, the event that ended these civs, was actually the eruption/explosion of Thera.
And I think it's pretty likely that the 'Atlantis' story refers to this event. And the 'Moses' bit about the plagues of Egypt. And the Odysey.
Of course, that's just a wild guess.
The Thera/Akatori/Santorini explosion has been dated to 1628 BC. (tree rings/ice core/other) Some, including myself, think this is/was the Exodus period.