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美国加州理工学院凯洛哥放射性实验室于1975年开始在南加州几条活动断层附近建立起一个氡-钍监测台网,以观测地下水氡为主要手段,以进行地震预报研究。到目前为止,该台网有十个观测井孔。自1980年以后,该台网除观测水氡外,还增加了CO_2、H_2、He、CH_4及CnHn等有机物和水温、水位等观测项目。一些观测数据和结果曾进行过报道,近两年来又开展了观测台网区的综合地震-水文地球化学研究工作,本文重点介绍近两年来在这方面取得的结果。
The Galluk Radiation Laboratory of the California Institute of Technology started to establish a radon-thorium monitoring network near several active faults in southern California in 1975. Radon-monitoring groundwater was the main measure to carry out earthquake prediction research. So far, the network has ten observation wells. Since 1980, besides the observation of water radon, the network has also increased the observation items of organic matter such as CO_2, H_2, He, CH_4 and CnHn and water temperature and water level. Some observations and results have been reported. In the past two years, comprehensive seismic-hydrogeochemical research on the observatory network has been carried out. This article focuses on the results achieved in this respect in the past two years.