STUDY OF LIGHTNING CURRENT AND ITS PROPAGATING PROPERTY UNDERGROUND BY REMANET MAGNETIZATION

在自然雷击区域、火箭触发的闪电、被闪电袭击的考古遗址和IG实验中，对剩余磁化进行了研究。在所有情况下，样品的磁方向在雷击点周围呈现顺时针模式（正闪电）和/或逆时针旋转模式（负闪电）。此外，还可以清楚地观察到剩磁强度与离雷点的距离之间的平方反比关系。鉴于几十年前在考古遗址中就已经发现了雷击剩磁的特性，我们认为雷击剩磁在研究雷电现象方面是有价值的。LRM作为照明电流的化石，可以阐明地下照明电流路径的重要特征，为接地设置提供有价值的信息。人们从气象学、高压工程、大气电学等不同角度对闪电进行了研究，这些研究都是从地面上进行的。本研究认为，磁化作为雷电电流的化石，将是未来雷电科学发展的新方法。

A study of remanent magnetization is made at the areas of natural lightning strikes, at the rocket-triggered lightning, at the lighting attacked archaeological site, at the IG experiment. In all the cases, the magnetic direction of the specimens shows a clockwise pattern(positive lightning)and/or a anticlockwise rotation pattern(negative lightning)around the point of lightning strike. Also, the squared inverse relation is clearly observed between the intensity of remanent magnetization and the distance from the lightning point. As such the property of lightning induced remanent magnetization is identified even in the archaeological site in few tens kyrs before, we conclude that the lightning caused remanent magnetization(LRM)is useful in the study of lighting phenomena. The LRM as the fossil of lighting current can elucidate the important feature of the path of lighting current underground, which becomes the valuable information for the setting of earth(grounding).Lightning has been investigated from various standpoints, such as meteorology, high-voltage engineering, atmospheric electricity etc., that are all adopted on the upper area from the ground. We, in this study conclude the magnetization as a fossil of lightning currents will be new method in the future progress of lightning science.