Earthlights on Peru's Earthquake?

From: http://www.signs-of-the-times.org/articles/show/138498-Earthlights+on+Peru's+Earthquake%3F

Aug 20, 2007

Following the terrible natural disaster on Peru, which caused hundreds of casualties, some local news agencies are also speaking about reports from locals of flashes of light in the sky both before and after the event. According to El Comercio from Peru,

"During the night ... before and after the stron earthquake, neighbours from the districts of Miraflores, La Molina and Cercado de Lima assured having seen the sky light up because of an unexpected lightning in the middle of the night. Nevertheless, the National Hydrology and Meteorology told El Comercio that it didn't detect any anomaly in Lima's skies, and assured that this phenomenon could have been caused by the light of a beacon or some spinning panels that exist in the city".

Over at MarcianitosVerdes, Luis Ruiz Noguez is receiving and collecting more reports from multiple witnesses who also claim to have seen the lights. Noguez prudently warns that before speculating if the incidents were indeed earthquake lights, the prosaic explanations must be ruled out first. The video above, posted on Marcianitos, is allegedly of one of the incidents. It was suggested to Noguez, and has been also featured over at this blog, that suggests it's triboluminescence. I think the point of light that can be seen in the video along with the flash is from a conventional source (an emergency light), maybe it's the same point of light that can be seen before the blackout. But the flash of light itself must have been indeed intense, and as there's no sound along with it, and apparently the local institutions did not report any weather anomaly, it may possibly be the record of an earth light.