Physical modelling of earthquake precursor by the electro‐optical parameters of gabbro rock under compressive stress

Earthquakes occur when tectonic stresses develop deep within the Earth. In the earthquake zone, the rocks are igneous, including gabbro. Gabbro rocks produce electron–hole pairs under tectonic stresses. These holes flow in the volume of gabbro rock under tectonic pressures and cause changes in electric charge and as a result, produce variable electric and magnetic fields that lead to a signal of electromagnetic waves at the place of pressure. This electromagnetic signal is received on the surface of the Earth after passing through different layers of the Earth. In this work, by applying uniaxial hydraulic pressure on the gabbro rock, a new physical model similar to an earthquake is presented, which by receiving and monitoring electromagnetic signals, can help to investigate the tectonic changes in the Earth. By utilizing the electrical and optical parameters, the intensity of the electromagnetic signal of the earthquake created on the Earth's surface is calculated.