Where are there electromagnetic fields?

Electromagnetic fields can be both natural and made by humans . Natural electromagnetic fields are present in the Earth. While they may be invisible, electrical fields are based on the build-up of electric charges in the environment.

Possible health effects Exposure to low frequency fields that are strong enough can lead to dizziness, seeing light flashes and feeling tingling or pain through stimulation of nerves . Exposure to radiofrequency fields that are strong enough can lead to heating of body tissue, and result in damage to tissues and organs.

Now, research suggests that some people do indeed perceive magnetic fields, albeit unconsciously . In response to a changing magnetic field, so-called alpha brainwaves, the background “hum” of the brain, quieted in human volunteers, scientists reported yesterday (March 18) in eNeuro.

Electromagnetic fields are present everywhere in our environment . Electric fields are produced by natural sources such as the local build-up of electric charges in the atmosphere associated with thunderstorms while the earth’s magnetic field is used by birds and fish for navigation.