Very Low Frequency Electromagnetic

Very Low Frequency Electromagnetic (VLF-EM) VLF-EM surveying is carried out with a combination magnetometer and VLF-EM receiver. This instrument is designed to measure the electromagnetic component of the very low frequency field (VLF-EM) which is transmitted from various stations within North America. In all electromagnetic prospecting, a transmitter induces an alternating magnetic field (called the […]