Very true, Krakatoa, the largest explosion in recorded history, was probably no picnic. The claim that the 1645 BC Santorini eruption/explosion was bigger than Krakatoa sent me to Google which turned up a site which you may find interesting: Santorini
This whole site (not just the linked page) has lots of pictures and good stuff on Santorini and volcanoes in general.
IMO, it was likely the 'fireworks' for the Exodus out of Egypt. The tree-rings worldwide recorded an 'event' centered at 1628BC.