What is RF ?
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Schumann Resonance
[EMF
Spectrum] [Ionizing]
[Non-ionizing]
[Near Field & Far Field] [RF
Hazards]
[Reflection]
[Interference]
[Faraday
Effect]
[Health
Effects] [RF
Protection] [The
SCP System]
[About
SAR] [Exposure
Models] [Glossary]
Extremely Low Frequency
(ELF) and Electromagnetic Fields (EMF's)
What is a Schumann Resonance?
Schumann Resonance' Is the Delicate Electromagnet Frequency God Has
Chosen For Life & Evolution On Our Planet!
Believe it or not, the Earth behaves like an enormous electric circuit.
The atmosphere is actually a weak conductor and if there were no sources of
charge, its existing electric charge would diffuse away in about 10 minutes.
There is a 'cavity 'defined by the surface of the Earth and the inner edge
of the ionosphere 55 kilometers up. At any moment, the total charge residing
in this cavity is 500,000 Coulombs. There is a vertical current flow between
the ground and the ionosphere of 1 - 3 x 10^-12 Amperes per square meter.
The resistance of the atmosphere is 200 Ohms. The voltage potential is
200,000 Volts. There are about 1000 lightning storms at any given moment
worldwide. Each produces 0.5 to 1 Ampere and these collectively account for
the measured current flow in the Earth's 'electromagnetic' cavity.
The Schumann Resonance's are quasi standing wave electromagnetic waves
that exist in this cavity. Like waves on a spring, they are not present all
the time, but have to be 'excited' to be observed. They are not caused by
anything internal to the Earth, its crust or its core. They seem to be
related to electrical activity in the atmosphere, particularly during times
of intense lightning activity. They occur at several frequencies between 6
and 50 cycles per second; specifically 7.8, 14, 20, 26, 33, 39 and 45 Hertz,
with a daily variation of about +/- 0.5 Hertz. So long as the properties of
Earth's electromagnetic cavity remains about the same, these frequencies
remain the same. Presumably there is some change due to the solar sunspot
cycle as the Earth's ionosphere changes in response to the 11-year cycle of
solar activity. Schumann resonances are most easily seen between 2000 and
2200 UT.
Given that the earth's atmosphere carries a charge, a current and a
voltage, it is not surprising to find such electromagnetic waves. The
resonant properties of this terrestrial cavity were first predicted by the
German physicist W. O. Schumann between 1952 and 1957, and first detected by
Schumann and Konig in 1954. The first spectral representation of this
phenomenon was prepared by Balser and Wagner in 1960. Much of the research
in the last 20 years has been conducted by the Department of the Navy who
investigate Extremely Low Frequency communication with submarines.
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