Geography & Earth
Advanced

Schumann Resonance

Fundamental electromagnetic resonance of the Earth.

Formula

f1≈c2πREf_1 \approx \frac{c}{2\pi R_E}

Variables

cSpeed of light
R_EEarth radius

Example

Gives about 7.8 Hz for the lowest mode

Did You Know?

The Earth–ionosphere cavity "rings" at about 7.83 Hz — a faint global electromagnetic heartbeat driven by lightning.

atmosphereelectromagnetismearth