Study of Extremely Low Frequency Electromagnetic Wave Propagation along the Seashore of Bajiaogang in Shandong, China
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Great attention has been paid to the extremely low frequency (ELF) electromagnetic waves due to its important application in long-distance communication, undersea detection and guidance. Most previous researches, however, focus on the propagation characteristics of VLF/ELF signal conducted by earth-ionosphere or undersea water. This paper endeavors to study the ELF wave propagation travellin along the seashore. To achieve this, an experiment is designed: high sensitive conducted magnetometers are adopted to capture the ELF signal produced by a pair of electrodes submerged in the sea-water along the coast. The results showed that for 5 Hz and 10 Hz the trend agreed with the normal logarithm function, but with a pecularity of peak at around 550 m.
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