Earthquake Lights Make Rare Appearance In San Diego
The mysterious Earthquake Lights, which some scientists attribute to the piezoelectric properties of quartz-heavy rock layers during tectonic activity, are a rare phenomenon. This example was shot recently during a rash of seismic activity in San Diego. Once thought a myth, Earthquake Lights weren't accepted by scientists until the late 1960's when photographic evidence arose to confirm their existence. More information here and here. Might this or a similar phenomenon be behind reports of "Spook Lights" and the like?