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An Observation of Coseismic Atmospheric Electricity Signals using Electrostatic Antenna.

使用静电天线观测同震大气电信号。

基本信息

批准号：
12450114
负责人：
TAKEUCHI Nobunao
金额：
$ 6.59万
依托单位：
Akita Prefectural University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

项目摘要

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

为了研究与地震有关的大气电变化信号，我们准备了大型静电天线，并对这种微小的波动信号进行了观测。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测棚，在那里放置了用于记录观测信号的数据采集机。这些机器正在无人驾驶的长期观察下运行空调。选择以下三个地点作为观测地点，并在每个地点安装观测系统。选择的观测地点如下。(1)位于秋田本庄市的秋田县立大学本庄校区。(2)位于秋田协和町的秋田县立大学的研究室。(3)秋田县森南村的农民广场。从2000年8月开始，在强降雪地区进行了大型静电天线的耐气候试验， ...更多信息整个观测系统的调试工作仍在继续，实验数据也已初步收集。从2001年5月开始，继续进行了全面的观测，2001年12月2日22时02分左右，岩手县南部地区的地下深部发生了地震。这次地震的地震强度在整个秋田地区都在3级以上。我们在三个观测点成功观测到与传播地震波相关的各种变化信号，主要结果如下。(1)在地震波传播过程中，通过三个观测点，可以观测到地电位差变化和大气电性变化信号。(2)变化信号的幅度在每个观测点都有很大的不同。(3)大气电性变化的产生与地电位差变化密切相关。(4)可以推测，观测地点的地层条件对各种变化信号的产生有很大的影响。少