I was in Jerusalem a few years ago for Pascha and to my knowledge there's nothing that modern science can do to replicate what I saw and from the gasps from others around me we were seeing the same thing at the same time. A blue light bathing the outside of the shrine rising up around it in no particular pattern or timing - out of the stone itself it seemed, as Patriarch Diodoros described it. ( a description I read after I'd been there)
Whatever reason we have it, I understand it to be faithfulness to Christ's teaching, I think it's a blessing that it reminds us of where this all began, and that it's Jerusalem which is the Mother Church - not Rome, not Constantinople, not Russia.
Myrrh