We may wonder whether this strange cloud is just a natural phenomenon or a so-called earthquake light or there's more than our eyes can see?
Earthquake lights are reported to appear while an earthquake is occurring, although there are reports of lights before or after earthquakes.
They are reported to have different shapes with a white to bluish hue, but occasionally they have been reported having a wider color spectrum.
The luminosity is reported to be visible for several seconds, but has also been reported to last for tens of minutes.
A different explanation involves intense electric fields created piezoelectrically by tectonic movements.
Another possible explanation is local disruption of the Earth's magnetic field and/or ionosphere in the region of tectonic stress, resulting in the observed glow effects either from ionospheric radiative recombination at lower altitudes and greater atmospheric pressure.