Schumann Resonance: What It Is, How It Is Measured, and Current Evidence on Health Implications
The Schumann resonance refers to a set of extremely low-frequency (ELF) electromagnetic standing waves that occur in the cavity between Earth’s surface and the ionosphere. The fundamental mode is typically near 7.83 Hz, with higher harmonics roughly at integer multiples. These waves are generated primarily by global lightning activity, which provides broad-spectrum ELF excitation. In… Read More »