Schumann resonance refers to a set of natural, extremely low-frequency electromagnetic resonances that occur in the space between the Earth’s surface and the ionosphere—a conductive layer of the atmosphere. These resonances are excited primarily by global lightning activity, which generates electromagnetic waves that travel around the planet and form standing waves at specific low frequencies, with the strongest mode around 7.83 Hz and additional modes at higher intervals.
In scientific terms, Schumann resonances are part of the Earth’s natural electromagnetic background and are used in geophysical research to monitor global thunderstorm activity and ionospheric conditions. They arise because the Earth–ionosphere cavity acts like a resonant chamber for extremely low-frequency waves, which are continually excited by lightning discharges worldwide.
Because the fundamental Schumann frequency lies near the range of human alpha and theta brainwaves, it is sometimes poetically described as the “Earth’s heartbeat,” and has been referenced in wellness and holistic communities in discussions about grounding or natural environmental fields.
