I've just seen footage on U-Tube of a strange rainbow seen in the clouds just before the Quake last week. The colours are in reverse order to the usual after-shower rainbow. My mind tells me that if the colours are reversed then the source of the radiation must be from the opposite direction, i.e., not from the Sun above but from the earth below. I would liken this to the visual effect we see if we bend a plastic ruler, if the effect in plastic is 'visual' it must certainly relate to e-m radiation, perhaps the earth under enormous stress also experiences a change in emissions that might be used to forecast these devastating events? Any ideas or comments?