The technical characteristics of the natural electromagnetic radiation sounding and some verifiable observations of its mechanism
天然电磁辐射测深技术的特点与其工作机理的观测验证

A qualitative interpretation on the mechanism of electromagnetic radiation sounding has been published in this journal.The technical characterics of the natural electromagnetic radiation sounding are induced,according to the pratical observations,verifiable mentions and some current limitions of this prospecting technique are given in this paper.