What are Earthquake Lights? (Video)
Earthquakes have long been accompanied by the appearance of "bright, luminescent, multicoloured sky glows" that can take place any time before, during, or after the seismological event.
They've been recorded throughout history, but modern science has only started to take them seriously since the photographs of the Matsushiro earthquake lights taken by Yutaka Yasui between 1965 and 1967
There have since been extensive observations of several events, but the phenomenon currently remains unexplained.
WeatherWatch.co.nz head weather analyst Philip Duncan reported seeing 3 or 4 large flashes of light during the Christchurch quake last Saturday. GeoNet confirmed this phenomena and was keen to hear from others who had seen the light.
More details click here (and 3 short video examples).
See one example below...flashing occurs around 22 seconds in...from the Peru Quake back in 2007.