4 ms·

It takes time for the earthquake to propagate, much slower than the speed of light.

• mcpackieh 3y ago
  Earthquake lights have been reported minutes, hours, even days before the quake, and also after them. It's not transformers blowing up, although that also happens and can also light up the sky. The light seems to somehow be caused by massive increases or releases of stress in crystalline bedrock, possibly piezoelectrically in quartz, or similar mechanisms.
  • rich_sasha 3y ago
    There was a paper posted here on HBO that claimed some correlation between cosmic waves and seismic activity. At face value correlation was very strong. One feature was the asynchronicity - one of the variables had to be lagged, I can't remember which one. Not sure what to make it but possibly related to lights in the sky.