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1976年日本地震预报联络会提出日本东海地区存在发生大地震的可能性之后,大力加强了地震地下水的监测工作,主要由通产省工业技术院所属的地质调查所和东京大学理学部地球化学实验室负责进行。近十年来,日本已建立两个地震地下水观测网,记录到一些有价值的前兆异常现象,开展了若干新的地震预报途径的探索。地震地下水观测网建设地质调查所与东京大学理学部分别建立了两个地震地下水观测网,如图1所示。到1982年4月为止,该网包括12口井孔,观测的项目有水位、水氡与水化(pH值、电导率)三项,在水位观测井上,还开展气压、降水等气象因素的观测。
After the 1976 Japan Earthquake Prediction Network proposed the possibility of a major earthquake in the East China Sea, the monitoring of groundwater in the earthquakes was greatly strengthened. The survey was mainly conducted by the Geological Survey Institute under the Ministry of Industry and Technology, Ministry of International Trade and Industry and the Geochemical Laboratory of the Faculty of Science, University of Tokyo Responsible for. In the past decade, Japan has established two seismological groundwater observation networks that record some valuable precursory anomalies and carried out a number of new exploration methods for earthquake prediction. Seismological Groundwater Observatory Construction Geological Survey and the Faculty of Science, University of Tokyo, respectively, established two seismic groundwater observation network, as shown in Figure 1. As of April 1982, the network consisted of 12 boreholes, with three observation items of water level, water radon and hydration (pH value and conductivity). In the water level observation wells, weather pressure, precipitation and other meteorological factors Observation.