# 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
Technical progress and the era of digital technology have created modern, fundamentally new technical capabilities for recording the Earth's electromagnetic field and statistically processing large amounts of data. Therefore, all hopes for future discoveries regarding the mechanisms underlying the influence of SRs on the human body relate to modern research. In the 21 st century, the basic methodology for deciphering hidden information in brain signals has expanded [86]. There is an understanding of the creation of a unified methodology for studying SRs [87]. Fundamental knowledge about the Earth's magnetic field has increased. For example, there is an increased understanding of key aspects of the Earth's geomagnetic field, including dipole moment decay, changes in the South Atlantic anomaly and the positions of the magnetic poles, which are critical for effective space weather forecasting [88,89]. Progress has been made in modeling the magnetospheric magnetic field [90,91] and space weather [92]. This allows observational data to be combined with flexible models to better understand the dynamics of the Earth's magnetic environment. It has become possible to measure magnetic fields from geostationary orbit [93]. This has improved space weather monitoring and the scientific understanding of the interaction between near space and the Earth's magnetosphere. For modern science, the great importance of understanding the geomagnetic field of the Earth and its response to external influences is already obvious [94,95,96]. This forms a new paradigm of views on the entire problem of geomagnetism and all related transdisciplinary issues. New opportunities have emerged for simultaneously recording the parameters of the Earth's electromagnetic field around the world. For example, the Global Coherence Monitoring System (GCMS) was created to measure the dynamics of the Earth's magnetic field and SRs. In 2008, the first \"Maggie\" magnetometer was installed in the United States. GCMS currently has a network of 12 magnetometers located in New Zealand, South Korea, Japan, Malaysia, India, South Africa, Saudi Arabia, Colombia, USA, Canada, Argentina and Lithuania [97]. The magnetometers are equipped with two ANT4 magnetic field detectors (Zonge Engineering Inc., Zonge International, 3322 E. Ft. Lowell Road, Tucson, AZ 85716, USA). The detectors are oriented north-south and east-west. Signals are digitized by a 24-bit data acquisition system with an average frequency of 130 Hz. The spectral power calculation is performed using the east-west component. A smooth response in the range of 0.01-300 Hz is ensured by the large bandwidth of the magnetometers. The measurement is carried out (according to the Nyquist theorem) only for frequencies up to 65 Hz [98]. The data acquisition equipment records Schumann resonance amplitude data in a time-locked manner using a global positioning system. These data are recorded on a central server. The methodology for measuring local Schumann resonance amplitude data is described in detail in [98,99]. This allows for an estimate of the Schumann Resonance Complexity Index (SRCI), which is calculated using a calibrated H-rank algorithm from the local magnetic field data recorded by each GCMS magnetometer [100]. This should improve the quality of research methodology in this scientific area. Thanks to the creation of this system, many scientists have received the technical opportunity to study the influence of the Earth's magnetic field and SRs. Science has advanced in understanding many issues of geomagnetism and biomagnetism, but research into the interaction of the human body with the Earth's magnetic field at Schumann resonance frequencies is still far from achieving its ultimate goal. To date, aspects of the interaction between the human body and the Earth's magnetic field in the frequencies of the Schumann resonance spectrum have been studied in three organ systems of the human body: the nervous system, the cardiovascular system and the urinary system.