# Schumann Resonances and the Human Body: Questions About Interactions, Problems and Prospects
## 3 Results
### Earth's Magnetic Field and Schumann Resonance Frequencies: Origin and Essence
This is due to the peculiarities of the organization of planet Earth and its atmosphere. On the one hand, the Earth's surface has high electrical conductivity and a negative charge. On the other hand, above the Earth's surface, there is an ionized, electrically conductive upper layer of the atmosphere, which is positively charged relative to the Earth's surface. This positive charge in the atmosphere arises due to the ionizing effect of solar radiation at high altitudes. Under the influence of solar radiation, a circular conductive layer appears in the atmosphere, which is called the ionosphere/plasmosphere. The plasmasphere can have a charge equal to hundreds of thousands and even up to millions of volts relative to the Earth's surface. The plasmasphere has high electromagnetic conductivity and is capable of reflecting short radio waves. Therefore, the plasmasphere is an inexhaustible generator and energy accumulator. In essence, this is a system of an \"Earth capacitor\", which is charged due to solar radiation/\"solar wind\"; in the upper layers of the atmosphere, ions are constantly formed from air molecules under the influence of the energy of solar radiation particles. When a thunderstorm/lightning strike occurs, the voltage slightly decreases and then increases again [31; 32; 33]. The second fundamental feature is that the surface of planet Earth, together with its plasmasphere, from the point of view of physics, is a spherical resonator [34]. The plasmasphere and the Earth's surface are impenetrable to several frequency ranges. This forms a so-called conventional \"mirror cavity\" above the surface of the planet in its atmosphere--a waveguide channel. It is these resonator properties that are the basic features that determine the specificity of electromagnetic variations in the Earth's magnetic field and form the so-called Schumann resonance frequencies. This is because electromagnetic waves are reflected from the Earth's surface and from the plasmasphere as from mirrors. As a consequence, electromagnetic waves, being reflected many times, circle the Earth. At the same time, they are characterized by behavior in accordance with the laws of physics: superimposed on each other, they can either be extinguished or reinforce each other--resonate. In such a resonator, waves of certain frequencies, repeatedly reflected from the layers of the plasmasphere and the Earth's surface, are capable of circling the globe more than once. If the electromagnetic wave arising in the cavity of the Earth's resonator, after circling the globe, again coincides with its own phase and enters resonance, then a so-called standing wave (soliton) is formed. Wave processes in the low (3 Hz-3 kHz) and very low (3-30 kHz) frequency ranges, as well as all types of electromagnetic radiation, are reflected from the Earth's surface and ionosphere [35; 36]. Therefore, a certain characteristic pattern of low-frequency electromagnetic resonances constantly exists above the Earth's surface, which creates a certain local electromagnetic background with peaks at frequencies around 7.8, 14.3 and 20 Hz. These frequency peaks are called Schumann waves or Schumann resonances (SRs) [37; 38; 39; 32]. [PERSON] was the first to describe the phenomenon of SRs. Later, when other scientists in different countries began intensively studying the plasmasphere, these resonant frequencies of the plasmasphere were measured with great accuracy [40]. In 1949, the German scientist [PERSON] was first person who reported the existence of a spherical resonator on Earth--a plasmasphere with several fixed resonant frequencies. In 1952, [PERSON] published the first scientific paper on the existence of low-frequency resonances in a physics journal [41; 42]. Studying electromagnetic fields in the Earth-ionosphere cavity, [PERSON] first theoretically predicted the existence of natural resonances in the ionosphere. Calculations he made based on the size of the Earth and its ionosphere initially showed the frequency of the Earth's fundamental resonance to be approximately 10 Hz.