Electromagnetic Radiation Induced by Acoustic Waves in Igneous Rocks: Amplification and Generation through Igneous Rocks
摘要
The relevance of this study is to analyze a potential mechanism for the amplification and generation of electromagnetic radiation during the preparation, manifestation, and subsequent attenuation (aftershocks) of seismic events. Previous studies have shown that the impact of high-intensity ultrasound on ion-crystalline dielectrics can induce the generation of electromagnetic radiation at the ultrasound frequency and its first subharmonics. We studied samples of igneous rocks such as basalts, gabbro, and granites during our experiments. The purpose of the study was to study and subsequently analyze the physical mechanism responsible for the amplification and generation of electromagnetic radiation during the propagation of acoustic waves through igneous rock masses. Research methodology. During the research, a comprehensive approach, including methods of geophysics and engineering geology, mathematical modeling, string theory, and crystallography and mineralogy was applied. Research results. The conducted research has shown that the amplitude characteristics of the electromagnetic response to pulsed acoustic impact depend significantly on the electrical conductivity of the rock. Conclusions. The results we obtained allow us to draw the following conclusions. First, the stochastic combination of capacitive elements (“capacitors”), taking their oscillations in the seismic wave field into account, can lead to an increase in the overall potential (the effect of averaging the potential multiplier). Second, under shock wave impact, it is necessary to replace the temperature (T) in the models with the effective temperature. This substitution can increase the calculated values of the effective charge by several orders of magnitude and consequently, the intensity of electromagnetic radiation (EMR). Thus, processes such as crack formation and the propagation of powerful acoustic waves in rocks activate the contribution of practically all mineral components of these rocks to the generation of EMR.