The investigation of the asthenosphere on the first harmonic of the Schumann resonance

Abstract

The Schumann resonance manifests itself in the range of extremely low frequencies – ELF (3 ... 30 Hz), namely at frequencies: 7.83, 14.1, 20.3, 26.4, 32.4 (Hz), practically nested in the range ELF. Previously, the Schumann resonance was explained by a spherical resonator between the Earth's surface and the ionosphere so that the EM wave of the first harmonic, describing one revolution around the Earth, coincides with its own phase, which causes resonance. Such problems are described by complex equations of magnetohydrodynamics, which are analyzed by the method of oscillation of solutions of operator-difference equations. The analysis revealed that an EM wave at a frequency of 7.83 Hz propagates along an inner circle of radius r = 6101 km embedded in a circle with a polar radius R = 6357 km. This is due to the electrically conductive melt in the asthenosphere and the propagation of ultra-long radio waves along the lines of force of the geomagnetic field. Thus, based on the frequency of 7.83 Hz, the refractive index of the melt of rocks of the asthenosphere is calculated. The indicator is expressed by the Leontovich–Shchukin condition at the interface of two environments, previously used for underwater radio communication on ultra-long waves. The use of the Schumann resonance covers the search for hydrocarbons, minerals, earthquake prediction and geophysical research, as well as the study of phase transitions in the asthenosphere.