Tereshyn A. Electromagnetic studies of the Earth and the Moon

The thesis is devoted to the study of electrical conductivity of the Earth and the Moon. The theory of EM soundings of these cosmic bodies uses a magnetic mode, the electric mode is assumed to be negligible. The Applicant collected recent literature data which indicated the presence of vertical currents in the Earth's atmosphere, as well as indirect (non-electromagnetic) data on the crust and upper mantle of the Moon, that indicate the existence of vertical currents and an electric mode in them. The theoretical criteria for the response functions in the problem of global soundings of the Moon are written out and applied to the data that observed by the Apollo and Lunokhod missions. It is shown that the data do not meet the criteria, whence it follows that the published lunar electrical conductivity distribution models are not based on adequate observations. The recommendations for future study of the Moon are formulated. Analysis of tidal and tectonic moonquakes suggested the existence of plume-type structures. On the Earth, two anomalies were studied - Kirovograd and Carpathian using the simplest and most reliable methodology: the outrunning magnetovariational profiling with the determination of the anomaly location, its maximum depth and total conductivity. The MTS method is used to determine the practically important top edge depth. The continuation of the Kirovograd anomaly in the southern direction was established and its spatial correlation with the permanent magnetic field anomalies was investigated. Key words: electrical conductivity, electrical and magnetic modes, magnetovariational sounding and profiling, magnetotelluric sounding, response functions, Kirovograd and Carpathian electrical conductivity anomaly, Moon, moonquakes.