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为了研究地震产生的机理,需要分析和研究地下任意ELF线天线在地-电离层壳体中产生的电磁场。地下任意ELF线天线产生的电磁场可由地下ELF点源产生的电磁场进行叠加。首先导出了地下ELF点源在地-电离层壳体中产生的电磁场表达式,然后得到了地下任意ELF线天线在地-电离层壳体中产生的电磁场的表达式。分别讨论了地下单条和两条ELF线天线在地面上产生电磁场的场强空间分布图,用色标表示了场强值在空间分布的强弱。电磁场的水平分量在地面上产生电磁场的场强值要比垂直分量产生的场强值大,单条线天线在地面上产生电磁场的场强值要比两条线天线产生的场强值小。
In order to study the mechanism of earthquake generation, it is necessary to analyze and study the electromagnetic field generated by the underground ELF antenna in the ground-ionosphere shell. The electromagnetic field generated by any ELF line antenna underground can be superimposed by the electromagnetic field generated by the underground ELF point source. First of all, the expression of the electromagnetic field generated by the underground ELF point source in the ground-ionosphere shell is derived, and then the expression of the electromagnetic field generated by the underground ELF antenna in the ground-ionosphere shell is obtained. The spatial distribution of the field strength of the electromagnetic field generated by the single and the two ELF line antennas on the ground are discussed respectively. The intensity distribution of the field strength value in space is indicated by the color scale. The horizontal component of the electromagnetic field produces the field strength value of the electromagnetic field on the ground to be greater than the field strength value generated by the vertical component. The field strength value of the electromagnetic field generated by the single line antenna on the ground is smaller than the field strength value generated by the two line antennas.