Predictive Map of Geoelectric Sections of North and South America

Abstract

Predictive maps of geoelectric sections (GES) of North and South America are constructed. The GES maps are capable of increasing the accuracy of electromagnetic field calculations in the VLF−LF−MF ranges of radio waves by 1.5-3 times as compared to the Morgan-Maxwell map. The studies of electrical properties of layered media by combined radio and geophysical methods in a variety of natural and geological conditions, and the proposed method of GES mapping have resulted in the construction of a new generation of maps showing the electrical properties of the underlying medium that account for the layered structure of the crust and have no analogues in the world. Predictive geoelectric mapping of all the continents of the globe is completed.

Analysis of geoelectric sections and surface impedance of the layered medium of Palestine and Tanzania

“…We note the wide distribution of such structures not only for beaches on all oceans and seas of the Earth, but also in other regions. Therefore, such structures are typical for large areas of the earth's surface and must be taken into account when calculating the excitation and propagation of radio waves, as well as coastal refraction of the "land-sea" type in radio systems [3,4,[14][15][16][17].…”

“…To improve the accuracy of calculations of the electromagnetic field for layered structures, the frequency dependences of the surface impedance of the multilayer medium of Palestine and Tanzania were determined in the range of 10 kHz-30 MHz, which are necessary for calculating the function of field attenuation of radio waves. [3,4,[13][14][15][16] exceeds unity when the emitter and the observation point are located at the interface [3,4,[13][14][15][16][17]. We use a layered model of the underlying medium to calculate the propagation of LF-MF-HF radio waves along the earth's surface.…”

“…We use a layered model of the underlying medium to calculate the propagation of LF-MF-HF radio waves along the earth's surface. This model is realized in the form of GES maps of geoelectric parameters of the Earth's continents (countries) [8][9][10][11][12][13][14][15][16][17][18][19][20]. GES maps are the basis for the construction of frequency-dependent maps of surface impedance, which allow calculating electromagnetic fields in the ranges of VLF-LF-MF-HF [3,5,7].…”