Re: At the moment . . .
At the moment, the evidence Dino claims to be absent is pointing toward a comet/asteroid event. Impact likely did not occur, resulting in an aerial explosion, but that an explosion of unprecedented magnitude occurred is not in question.
Hollywood dream-weavers aside, what, other than a comet/asteroid event, could do that in 1908? That is the only question, therefore it is safe to presume a comet/asteroid event, as it tops the list of current possibilities.
Dan