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The global electromagnetic resonance phenomenon is named after physicist Winfried Otto Schumann who predicted it mathematically in 1952. Schumann resonances are the principal background in the part of the electromagnetic spectrum [2] from 3 Hz through 60 Hz [3] and appear as distinct peaks at extremely low frequencies around 7.83 Hz (fundamental), 14.3, 20.8, 27.3, and 33.8 Hz.
The fundamental Schumann resonance is at approximately 7.83 Hz, the frequency at which the wavelength equals the circumference of the Earth, and higher harmonics occur at 14.1, 20.3, 26.4, and 32.4 Hz, etc. Lightning strikes excite these resonances, causing the Earth–ionosphere cavity to "ring" like a bell, resulting in a peak in the noise ...
Ultra low frequency (ULF) is the ITU designation [1] [2] for the frequency range of electromagnetic waves between 300 hertz and 3 kilohertz, corresponding to wavelengths between 1,000 to 100 km. In magnetosphere science and seismology , alternative definitions are usually given, including ranges from 1 mHz to 100 Hz, [ 3 ] 1 mHz to 1 Hz, [ 4 ...
Winfried Otto Schumann (May 20, 1888 – September 22, 1974) was a German physicist and electrical engineer who predicted the Schumann resonances, a series of low-frequency resonances caused by lightning discharges in the atmosphere.
Extremely Low Frequency 3–30 Hz: 100,000–10,000 km Guided between the Earth and the D layer of the ionosphere. SLF: Super Low Frequency 30–300 Hz: 10,000–1,000 km Guided between the Earth and the ionosphere. ULF: Ultra Low Frequency 0.3–3 kHz (300–3,000 Hz) 1,000–100 km Guided between the Earth and the ionosphere. VLF: Very Low ...
It’s estimated that nearly 5% of Americans above the age of 12 live with hypothyroidism, a condition that occurs when the body experiences a deficit of thyroid hormone.. The thyroid gland ...
the Schumann–Runge bands between 176 and 192.6 nanometres (named for Victor Schumann and Carl Runge); the Herzberg bands between 240 and 260 nanometres (named after Gerhard Herzberg ); the atmospheric bands between 538 and 771 nanometres in the visible spectrum; including the oxygen δ (~580 nm), γ (~629 nm), B (~688 nm), and A-band (~759 ...
The National Weather Service will even issue wind chill advisories and warnings when wind chill values drop low enough that they could cause frostbite or other harm to the skin in less than 30 ...