The Schumann resonances (SR) are a set of spectrum peaks in the extremely low frequency (ELF) portion of the Earth’s electromagnetic field spectrum.
According to The Schumann Resonance, Earth’s vibrational frequency is measured at 7.83 Hz, which is within the Theta state (between 4-8Hz).
When measuring in human brainwave state, Theta relates to a meditative, hypnotic, day dream, flow state.
Want to know what it sounds like? Listen to this binaural beats version.