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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.
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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 ...
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.
English: Three Fantasiestücke (Three Fantasy Pieces ) opus 111 de Robert Schumann (1851). Deutsch: Drei Phantasiestücke ( Fantasiestücke) opus 111 von Robert Schumann (1851). Date
The following other wikis use this file: Usage on ca.wikipedia.org Neue Zeitschrift für Musik; Usage on de.wikisource.org Neue Bahnen; Index:Schumann Neue Bahnen 1853 (Zeitschrift).pdf; Seite:Schumann Neue Bahnen 1853 (Zeitschrift).pdf/1; Seite:Schumann Neue Bahnen 1853 (Zeitschrift).pdf/2; Usage on ja.wikipedia.org ロベルト・シューマン
A frequency vs. time plot (spectrogram) showing several whistler signals amidst a background of sferics as received at Palmer Station, Antarctica on August 24, 2005.A radio atmospheric signal or sferic (sometimes also spelled "spheric") is a broadband electromagnetic impulse that occurs as a result of natural atmospheric lightning discharges.