Cosmic Cycles
Schumann Resonance (Fundamental)
7.83 Hz
Cosmic Octave Color
Derived visible color (544 nm)
Display swatch #99c320
Octave-shifted: 31.32 Hz (+2 octaves)
EstablishedAstronomical Mapping
Evidence Level
Established
Source Count
1
Last Reviewed
March 23, 2026
Directly measured, standardized, or well-supported in mainstream scientific or technical literature.
The underlying cycle is measurable, but the audible tone is an octave-transposed mapping used for comparison, listening, and practice rather than a naturally audible emission.
Review the evidence modelThe fundamental Schumann resonance at ~7.83 Hz is an electromagnetic standing wave in the cavity between Earth's surface and ionosphere, excited by lightning discharges. Falls in the alpha-theta brainwave border.
Wavelength
43.81 m
Claim Type
Astronomical Mapping
Cosmic Relation
Electromagnetic resonance between Earth's surface and ionosphere
Cosmic Octave Color
Derived visible color (544 nm) · #99c320
Source
W.O. Schumann (1952)
Sources
Geophysics and Schumann Resonance Literature
1 atlas references
Used for atmospheric resonances, Earth-ionosphere cavity behavior, and related geophysical frequencies.
W.O. Schumann (1952) and later geophysical literature.
Historical Use
Used in sound healing and brainwave entrainment, sometimes called the "Earth's heartbeat"
schumannearthelectromagneticresonance