I really do not know what may be these lights, some people had mention that lighting effects from previous days rehearsals of Roger Waters first concert (It was at Foro Sol in Mexico City on the 28th); the lights appeared on 27th and were seen "near" or in the area of the concert, nearer of the Mexico City's Airport, people whom record them do not specify to where they were though. I had been lookin for images of lights before earthquakes as well, had never been in one of those kind of concerts, do not know what kind of show lights it can display, from the lights place to the concert place, it can be around 5km of distance....still do not know for sure if those are either or ...