This global electromagnetic resonance phenomenon is named after the physicist Winfried Otto Schumann, who mathematically predicted it in 1952. This global electromagnetic resonance phenomenon is named after the physicist Winfried Otto Schumann, who mathematically predicted it in 1952.
The Schumann resonance frequencies are electromagnetic waves excited by lightning along the Earth's circumference.
The low frequency is about 7.83 Hz, five octaves higher produce a sound of 250.56 Hz.