Hessdalen lights (HL) are unexplained light balls usually seen in the valley of Hessdalen, Norway. In this work, we present a model to explain the spatial color distribution of luminous balls commonly observed in HL phenomenon. According to our model, these light balls are produced by electrons accelerated by electric fields during rapid fracture of piezoelectric rocks under the ground. Semi-relativistic light balls in the HL phenomenon are produced by ionic acoustic waves (IAW) interacting with a central white-colored light ball of HL phenomenon.
Keywords: Hessdalen Lights—Rock piezoelectricity—electron avalanche—Fractoemission
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