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Natural VLF Radio - Sounds of Space Weather
*
2018 recording by NASA RBSP (Radiation Belt Storm Probe)
{{DEFAULTSORT:Dawn Chorus (Electromagnetic) Electrical phenomena Geomagnetism
The electromagnetic
In physics, electromagnetism is an interaction that occurs between particles with electric charge via electromagnetic fields. The electromagnetic force is one of the four fundamental forces of nature. It is the dominant force in the interacti ...
dawn chorus is a phenomenon that occurs most often at or shortly after dawn
Dawn is the time that marks the beginning of twilight before sunrise. It is recognized by the diffuse sky radiation, appearance of indirect sunlight being Rayleigh scattering, scattered in Earth's atmosphere, when the centre of the Sun's disc ha ...
local time. It is believed to be generated by a Doppler-shifted cyclotron interaction between anisotropic distributions of energetic (> 40 keV) electrons and ambient background VLF noise. These energetic electrons are generally injected into the inner magnetosphere at the onset of the substorm expansion phase.
Dawn choruses occur more frequently during magnetic storms.
This phenomenon also occurs during aurorae, when it is termed an auroral chorus.
With the proper radio
Radio is the technology of communicating using radio waves. Radio waves are electromagnetic waves of frequency between 3 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connec ...
equipment, dawn chorus can be converted to sounds that resemble, coincidentally, birds' dawn chorus.
See also
* Auroral chorus * Dawn chorus (birds) * Hiss (electromagnetic) *Whistler (radio)
A whistler is a very low frequency (VLF) electromagnetic (radio) wave generated by lightning. Originally published by Stanford University Press, Stanford, California (1965). Frequencies of terrestrial whistlers are 1 kHz to 30 kHz, wi ...
*" Cluster One," a Pink Floyd
Pink Floyd are an English Rock music, rock band formed in London in 1965. Gaining an early following as one of the first British psychedelic music, psychedelic groups, they were distinguished by their extended compositions, sonic experiments ...
track using sferics
A radio atmospheric signal or sferic (sometimes also spelled "spheric") is a broadband Electromagnetic radiation, electromagnetic impulse that occurs as a result of natural atmospheric lightning discharges. Sferics may propagate from their lightn ...
and dawn chorus as an overture
Notes
Further reading
* *External links
*Natural VLF Radio - Sounds of Space Weather
*
2018 recording by NASA RBSP (Radiation Belt Storm Probe)
{{DEFAULTSORT:Dawn Chorus (Electromagnetic) Electrical phenomena Geomagnetism