Journal of Cave and Karst Studies - ISSN 1090-6924
Volume 58 Number 1: 35-37 - April 1996

A publication of the National Speleological Society

Extremely Low Frequency Radio Emissions in Bat Caves
Walton C. Koemel

Abstract

Bats produce very low frequency (VLF) radio pulses and display magnetic qualities. Extremely low frequency (ELF) radio emissions were observed inside bat caves. Ground return currents from 60 Hz AC power systems run through the ceiling of some bat caves.

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