An Observation of Coseismic Atmospheric Electricity Signals using Electrostatic Antenna.

为了研究与地震有关的大气电性变化信号，我们制作了大型静电天线，并对这一微小的起伏信号进行了观测。观测系统由大型静电天线、数字记录仪和各种传感器组成。在静电天线附近设置了观察室，在那里放置了记录观测信号的数据采集机。这些机器是在运行空调的无人长期观察中操作的。选择以下三个地点作为观测点，每个地点都安装了观测系统。选择的观测点如下：(1)秋田本州市秋田县立大学本州校区。(2)秋田县立大学会堂。(3)秋田森南村农民广场。从2000年8月起，在大雪地区和一个…下对大型静电天线进行耐候性测试对整个观测系统进行了进一步的调整，初步收集了实验数据。自2001年5月以来，一直在继续进行充分的观测。2001年12月2日22时02分左右，岩手县南部地区地下深部发生地震。本次地震秋田全区地震烈度均在3度以上。我们在三个观测点成功地观测到了与传播地震波有关的各种变化信号。主要结果如下：(1)通过三个观测点传播的地震波可以观测到地电势差变化和大气电性变化信号。(2)每个观测点变化信号的幅度有很大差异。(3)大气电性变化的产生与地势差异变化中的一个密切相关。(4)可以推测，观测点的地层条件对各种变化信号的产生有很大影响。较少

To investigate variation signal of atmospheric electricity related to the earthquake, we prepared large electrostatic antennas and made observation of this minute fluctuation signal. The observation system is composed with the large electrostatic antenna, digital recorder and various sensors. Nearby the electrostatic antenna is set the observation hut where data gathering machines to record the observed signals are placed. These machines are being operated in unmanned long-term observation running an air conditioner. The following three places were selected as an observation place and the observation system is installed at each place.The chosen observation places are as follows.(1) Honjo campus of Akita prefectural university in the Honjo City, Akita.(2) The seminar house of Akita prefectural university in the Kyowa Town, Akita.(3) The farmer's square in Sennan Village, Akita.From the August 2000, climate-proof test of the large electrostatic antenna under the heavy snowfall area and a … More djustment of whole observation systems had been continued and experimental data collected preliminarily. From the May 2001, full observation has been continued.The earthquake occurred in the deep underground of south region of Iwate at about 22:02 on December second, 2001. Seismic intensity of this earthquake is above 3 in the whole region of Akita. We succeeded to observe various variation signals related with the propagating seismic wave in our three observation places.Main results are as follows.(1) Earth potential difference variation and atmospheric electricity variation signals can be observed in the seismic wave propagating through three observation places.(2) The amplitude of the variation signal is much different in each observation place.(3) The generation of the atmospheric electricity variation is strongly related with one of the earth potential different variation.(4) It can be guessed that stratum condition of the observation place greatly affects the generation of the each variation signal. Less