At least one of the videos linked from the references in that article is pretty dramatic, with frequent pulses of blue light from different locations near the ground.[1]
If there is a link between cosmic radiation and earthquakes (and that's a very big "if"), could it be Cherenkov radiation caused by super-high-energy particles exceeding the speed of electromagnetic radiation in bedrock/soil/whatever (not C, obviously, but the lower speed that the radiation travels through that media)? Basically a colossal natural version of detecting neutrinos by their flashes of light in a tank of water?
I live in Chile, one of the most seismically active countries in the world, and been through several earthquakes. Those lights? Just transformers and power lines blowing up. In the 2010 earthquake [1] we had several >6 Mag. aftershocks for days and we didn't see more flashes after the first shaking, simply because there wasn't power anymore.
Did you see anything like the number of blue flashes from transformers that are in that video? That was what I assumed at first as well, but it seems like far too many, unless there's something different about the way electrical grids are wired up in Mexico and Chile.
On further reflection, I'm adding this extra note indicating that I think my theory doesn't really work, even if it was a fun idea. Generating that much blue light via Cherenkov radiation seems like it would require such a flood of high-energy particles that it would have killed everyone in the area.
If there is a link between cosmic radiation and earthquakes (and that's a very big "if"), could it be Cherenkov radiation caused by super-high-energy particles exceeding the speed of electromagnetic radiation in bedrock/soil/whatever (not C, obviously, but the lower speed that the radiation travels through that media)? Basically a colossal natural version of detecting neutrinos by their flashes of light in a tank of water?
[1] https://twitter.com/webcamsdemexico/status/15729247312584622...