Long Wave Spectrum

• 3 Hz to 30 Hz     =    ELF*   (100 Mm – 10 Mm) • 30 Hz to 300 Hz     =   SLF   (10 Mm – 1 Mm) • 300 Hz to 3 kHz     =   ULF    (1 Mm – 100 km) • 3 kHz to 30 kHz     =   VLF   (100 km – 10 km) • 30 kHz to 300 kHz   =     LF   (10 km – 1 km) *Popular misuse calls anything from about 3 Hz to 3 kHz ELF