雷と大地の電磁気現象 : 誘導地電位の卓越方向と落雷に伴う残留磁化

概要

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The study of the induced electric self-potential at the lightning has been made at several stations in Chubu area. The pricipal direction in the induced electric self-potential is observed at most of the stations. At the station near the active faulting, the principal direction is perpendicular to the azimuth of the fault. The temporary change of the principal direction is analyzed at three stations. Lightning strikes sometimes cause the anomalous remanent magnetization underground. The area affected by the strong magnetic field at the lightning was examined by the rockmagnetic analyses. The induced magnetization in the soil indicates the exact point of the ligtning strikes. Also, the distribution of the remanent magnetization suggests the path of the lightning current underground.
独立行政法人防災科学技術研究所の論文
1995-03-31