I've read that after Thera blew in 1628BC and sent tsunamis over Crete destroying the Minoan civilizations.The idea of the tsunami was dreamed up decades ago. The 1628 BC date for the eruption was seized on due to some chronology problems in the Near East (ahem) and derived from proxy data from Greenland. The actual experts refuted that date by noting that the chemical signatures not only don't match Thera's. Others noted that there are a variety of other traces of eruptions much later than 1628 BC.
And, Professor Mike Baillie, in his excellent book Exodus To Arthur using tree-rings, makes a compelling case for a 1628BC date for the Thera explosion. On page 58 of that book he says:"In 1987, data regarding a new acid layer at 1645+/-20 BC, in the important Dye 3 ice core from Greenland, was published. Claus Hammer and his co-workers suggested that this new date might be Santorini..."
Also, I think the ancient Egyptian dates are highly suspect.
I definately do not believe Thera/Santorini was the location of Atlantis. I'm presently looking towards SE Asia for Atlantis, 8-9,000 years ago.