Is Atlantis identical with Santorini? Maybe that is the wrong question. Probably at no time there was a place whose name was written ''Atlantis'' on some map...But the theory that the volcanic disaster of Santorini is the source behind Plato's story of Atlantis is quite supported, in my opinion more than any other theory. Details will remain unclear. For example, some people associate Crete with Atlantis rather than Santorini. This is not opposite to the Santorini theory. Santorini and Crete shared a culture, that dissappeared on Crete about 100 years later than the eruption. Likely, the impacts of the eruption were enormous for the whole region and might have weakened the power of the Minoans on Crete, so that they could not survive for more than 100 years longer. Also, Crete would fit better to some aspects of Atlantis as described by Plato. Actually it is not very clear from Plato's writings, whether the descibed Metropolis and the larger mainlad of Atlantis are the same geographic place. So, maybe, the mainland was Crete and the Metropolis with its concentric structure of land and sea could have been Santorini. But going further [than] this point, we are stepping into fiction ourselves.
Fraternally, Philip Carter / Facebook / Great is Truth and mighty above all things (I Esdras 4:41)