I've seen dates ranging from 2300 to 1500 also.
But I believe all these dates are subject to the same 'guesswork', and that the odds are that they still all relate to the same group of events.
I would also agree that the Thera event is almost certainly linked to the exodus story.
I read a report on one guys study to tie the plume of the Thera volcano to the words, Staff by day, Torch by night, from the bible. He concluded that the plume would have to be 30 miles high to fit the bill. The recent Pinatubo volcano in the Phillipines was 26 miles high. So......