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近地表土壤中的不同~(222)Rn浓度可为识别地下流体的流动提供一个灵敏的信号。这种流动可指示:~(222)Rn的赋存地段,从而预示地下铀矿体。如果这种流动起因子地震前的应力积聚,则它们可给出预报信号,在铀矿床附近的地震带观察到了近地表氡的系统变化,这类变化都可归因于地下流体的流动。氡浓度变化并不都与地震有关。我们考察发现,温度、气压、湿度与风力都与这种氡浓度变化无关.在众多的因素中只有地潮触发(earth tidal triggering)的可能性目前还不能排除,现正在研究中。我们在离震源很远处已测到了与地震有关的氡浓度变化,距离可用一个简单的扩散模型来估算,对五级或五级以上的地震可达数百公里。这一理论的基本点是,当应力值随着地震量级增加时,由扩散回路产生的应力的最大距离(X)随X~(-3)而变化,我们根据对纽约州兰山湖(Blue Mountain Lake)附近的由地震引起的氡浓度实测结果推算了一个灵敏度下限。为了预报地震,最好建立起一个全球性~(222)Rn的监测网。
Different near-surface soils ~ (222) Rn concentration can provide a sensitive signal for identifying the flow of subsurface fluids. This flow can indicate the occurrence of ~ (222) Rn, indicating the underground uranium ore body. If such flow causes accumulation of pre-earthquake stresses, they can give a prediction signal and systematic changes in near-surface radon are observed in seismic belts near uranium deposits, all of which can be attributed to the flow of subsurface fluids. Not all changes in radon concentrations are related to earthquakes. Our study found that temperature, pressure, humidity, and wind are independent of this change in radon concentration, and that only the potential of earth tidal triggering among many factors can not be ruled out and is currently under investigation. We have measured radon concentration changes related to earthquakes very far from the source. The distances can be estimated using a simple diffusion model and can be up to hundreds of kilometers for earthquakes of magnitude 5 or above. The basic point of this theory is that the maximum distance (X) of stress generated by the diffusion loop varies with X ~ (-3) when the stress value increases with the magnitude of the earthquake. An earthquake-induced concentration of radon near Blue Mountain Lake deduced a lower sensitivity limit. In order to predict the earthquake, it is best to establish a global monitoring network of (222) Rn.