M.A. Persinger J.S. Derr 1986 Luminous phenomena, mostly nocturnal lights, are associated with very small earthquakes in southern Washington state. The phenomena seem to be electrical in nature, related to earthquake lights, and tend to occur when the locus of earthquake activity moves across an active fault in an area of compressional stress. ?? 1986 Birkha??user Verlag Basel. application/pdf 10.1007/BF01940703 en Luminous phenomena and earthquakes in southern Washington article