Detecting Electromagnetic Geographical Environment Changes Based on the Frequency-Intensity Curve

Table 2

Threshold of each frequency band.

Frequency (Hz)	Electric field		Magnetic field		High-frequency electric field
	0~100 K	100 K~200 K	0~100 K	100 K~200 K	200 K~10 M	10 M-2 G
Threshold ()	0.9880	3.2313	0.1994	0.1261	9.3791	6.6981