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在1983年2月27日日本标准时间(JST)21时14分地震时,一个频带在81—82 kHz的多点方位测定系统正在工作。在杉户、杉并区、足尾山地和八岳已经建立起观测台,正期待着根据由地震活动性可能会产生的任何一种类型的电磁前兆发射,用方位测定方法确定地震震中位置。虽然我们不认为已全部理解了这里所报告的资料,但对于1983年2月27日地震,的确有证据表明,在主震前约8小时开始,从观测到的不平常的发射可以得到震中位置的指示。在我们的研究结果基础上,讨论这一地震预报方法的可行性。
At the time of the Japan Earth Hour (JST) at 21:14 on February 27, 1983, a multi-spot azimuth measuring system at 81-82 kHz was operating. Observatory stations have been established in Sugito, Suginami, foot-end mountain and Yatsugatake and are expected to determine the epicentral location by azimuth based on any one of the types of electromagnetic precursors that may be generated by seismic activity. Although we do not think that all the information reported here has been fully understood, there is indeed evidence for the February 27, 1983 earthquake that about 8 hours before the main shock, the epicenter can be obtained from the observed unusual emissions The instructions. Based on the results of our study, we discuss the feasibility of this earthquake prediction method.