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  2. Schumann resonances - Wikipedia

    en.wikipedia.org/wiki/Schumann_resonances

    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.

  3. Extremely low frequency - Wikipedia

    en.wikipedia.org/wiki/Extremely_low_frequency

    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 ...

  4. File:Schumann resonance animation.ogv - Wikipedia

    en.wikipedia.org/wiki/File:Schumann_resonance...

    Current events; Random article; ... (Ogg Theora video file, length 24 s, ... Animation of Schumann resonance in Earth's atmosphere. Date: 11 January 2012:

  5. Atmospheric electricity - Wikipedia

    en.wikipedia.org/wiki/Atmospheric_electricity

    The Schumann resonances are a set of spectrum peaks in the extremely low frequency (ELF) portion of the Earth's electromagnetic field spectrum. Schumann resonance is due to the space between the surface of the Earth and the conductive ionosphere acting as a waveguide. The limited dimensions of the earth cause this waveguide to act as a resonant ...

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    Image credits: Fragrant-Day5274 All cats are natural predators, and hiding in a small, confined space is their way of scoping their surroundings for potential prey.

  7. Week 13 Overreaction: the SEC and Big 12 playoff collapse ...

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    🖥️ Watch this full episode on YouTube Check out all the episodes of the College Football Enquirer and the rest of the Yahoo Sports podcast family at https://apple.co/3zEuTQj or at Yahoo ...

  8. Deloitte predicts record spending on Black Friday and Cyber ...

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    Gift ideas for people who are always cold: Blankets, slippers, towels warmers and more

  9. Earth's field NMR - Wikipedia

    en.wikipedia.org/wiki/Earth's_field_NMR

    Nuclear magnetic resonance (NMR) in the geomagnetic field is conventionally referred to as Earth's field NMR (EFNMR).EFNMR is a special case of low field NMR.. When a sample is placed in a constant magnetic field and stimulated (perturbed) by a time-varying (e.g., pulsed or alternating) magnetic field, NMR active nuclei resonate at characteristic frequencies.