The Earth has its own magnetic fields, produced primarily by fluxes in the molten metal in the outer core of the planet. This magnetic field extends from the interior of the planet to where it meets the solar wind, which emanates from the Sun. The main purpose of this field is to protect the planet from solar winds, which would otherwise destroy the protective ozone layer in our atmosphere.
Earth’s magnetic fields are comprised of a variety of sources, including the overall DC field of the planet, magnetized rocks under our feet, Schumann resonances, solar flares, tectonic plate movements, telluric currents on the planet’s surface, and cosmic radiation.
Magnetic fields cover the entire planet and fundamentally affect and support the function of everything living. All human activity is affected by the Earth’s magnetic environments – the human body is germinated, develops as an embryo, and grows into the human adult totally immersed throughout its entire lifespan within the Earth’s magnetic fields.
Because these magnetic fields are non-constant, currents are always being induced in a human body in motion. Even simple movements like bending or rotating the arms can induce currents of varying strengths within the body. Life and human functioning is dependent on these currents. We routinely see that when people stop moving around, they lose muscle mass, vitality, and function. Space program managers are keenly aware that it is not just a lack of gravity that has a negative impact on astronauts’ bodies, but the lack of the Earth’s magnetic field.
The Earth’s basic magnetic field is oriented longitudinally, north to south, as would be expected of any bar magnet. One of the most obvious uses of this natural field is for navigation (as with a compass). Animals and humans innately and subconsciously use this field and its ‘field lines’ for both navigation and spatial orientation.
Human and animal bodies contain trace amounts of magnetite, one of the most magnetically-sensitive minerals on Earth. This causes the brain to be both a receiver and a transmitter of energy and signals, and is one of the foundations for the biological effects magnetic fields have on the human body. The interaction between magnetite in the body and the Earth’s magnetic fields allows birds and other animals to navigate along the magnetic field lines of the planet.
The Earth’s ionosphere is a complex electrical system. It is impossible to know exactly how much ionospheric currents contribute to human exposure versus ground magnetic fields, since they are an interaction and combination of contributions from the horizontal ionospheric currents, field-aligned currents, distant currents in the magnetosphere outside the ionosphere and currents induced in the Earth’s surface.
Along with Earth’s basic DC field, the Schumann resonances make up what people tend to refer to as a set of “earth-based frequencies.” The Schumann resonances are a set of peaks in the extremely low frequency portion of the Earth’s electromagnetic spectrum, between about 3Hz and 60Hz, with the most distinct peak at 7.83 Hz, and other obvious peaks at 14.3, 20.8, 27.3, and 33.8 Hz. It is likely the magnetite present in human tissues that transmit the frequencies of the Schumann resonances throughout the brain. These resonate with environmental EMFs to create uniform frequency synchronization throughout the brain.
Because it is very difficult to isolate humans from external magnetic fields, it is not clear what impact the Schumann fields themselves have on humans. That being said, it is generally accepted in the community that the Schumann resonances are an important baseline from which the human brain maintains homeostasis. This range of frequencies has also been shown in various studies to be an important part of how the body heals itself. Schumann frequencies resonate mostly on the same frequency bands as the human brain and therefore can strongly affect brainwave function.
Naturally magnetized rocks in the ground may also produce some added stimulation to our bodies as we come into contact with their fields, and therefore should be considered a part of Earth’s magnetic field spectrum. Smaller magnetized rocks are called lodestones.
In addition to these naturally occurring magnetic fields, the Earth is now also bathed in artificial electric and magnetic fields created by man. These include televisions, microwaves, power lines, and cell phones, among many other sources.