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据日本《朝日新闻》1977年1月13日报道,东京都将于本月20日在稻城市安装一种地震预测观测仪器——电阻率变化仪。电阻率变化仪是由东京工大力武常次教授等人研制的。在凝灰岩上挖一条沟,将该仪器的四个电极埋在这条沟内,通交流电测量电阻。地震是地壳内产生的一种破坏现象,随着这种现象的出现,地壳的变形则以电阻变化的形式表现出来,该仪器就是用来捕捉电阻变化的。
According to Japan’s “Asahi Shimbun” reported January 13, 1977, Tokyo will be on the 20th of this month in Daocheng City to install an earthquake prediction observation instrument - resistivity variometer. Resistivity variation meter is often made by Tokyo University professor Wu et al. Dig a trench in the tuff, and place the four electrodes of the instrument in this trench, measuring the resistance of the alternating current. Earthquakes are a kind of destruction phenomenon in the crust. With the appearance of this phenomenon, crustal deformation appears in the form of resistance change. The instrument is used to capture the change of resistance.