Experimental Study on Lateral Wave Propagation of ELF Electromagnetic in the Mountain Scenario

Recently, great concern has been moved to the extremely low frequency (ELF) electromagnetic waves because of its long propagation distance and cross-media propagation characteristics. Numerous papers discussed the calculation of the field where Sommerfeld integral is the most popular one. However, seldom experiments are conducted to verify such studies. In this paper, an experiment is conducted in the mountain with different layers and the measured data agree well with the calculated value, which validates that horizontal electric dipole can accurately reflect the cross-media propagation of extremely low frequency electromagnetic signal in actual rock strata.