Statistical Characteristics of Electric and Magnetic Fields Produced by Multiple-Lightning Return Strokes

다중 낙뢰에 의하여 발생하는 전계와 자계의 통계적 특성

In order to obtain the detailed informations about the lightning electromagnetic fields, the electric and magnetic fields radiated by lightning return strokes were observed with the electric field sensor of hemi-sphere type and the magnetic field sensor of loop type and their physical characteristics were statistically analyzed. The multiple stroke occurrence numbers was 2.6. In multiple lightning strokes the amplitude of peak and the time interval between the subsequent strokes were decreased as the number of the subsequent strokes increases.