Mysterious 'Earthquake Lights' Reportedly Seen Over Morocco

Sightings of glowing aerial phenomena called 'earthquake lights' recorded over Morocco and shared online.
Experts know earthquake lights appear above areas of seismic activity but remain unsure of the cause.
Historical accounts of earthquake lights date back centuries but they are hard to study due to quake unpredictability.
Different types of earthquake lights, varying in location, duration and color, have been reported.
Possible explanations include tectonic plate friction generating electricity or shaking power lines, but the cause remains unconfirmed.