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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.
Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221.; The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies.
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 ...
CNN will air "9/11: Fifteen Years Later" twice starting at 8 p.m. on Sept. 11. A limited amount of new material will be available on the CNN Films website, but the archive will take time to build out.
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.
Spectators look up as the World Trade Center goes up in flames September 11, 2001 in New York City after two airplanes slammed into the twin towers in an alleged terrorist attack.
Dust: The Lingering Legacy of 9/11 is a 2021 documentary film about the toxic health effects of the dust created by the 9/11 attack on the World Trade Center. [ 1 ] [ 2 ] Steve Buscemi is the executive producer of the film.
After the September 11, 2001, terrorist attacks, heart-wrenching images surfaced and stirred the world. Photos released by the US National Archives in 2016 show exactly when President George W ...