川滇地区强震前水氡和水汞短期综合异常特征研究

Characteristics of Short-term Synthetical Anomalies of Radon and Mercury Content in Groundwater in Sichuan-Yunnan Region before Strong Earthquakes

用斜率k和相关系数r值提取川滇地区水氡和水汞的单项短期异常,用群体非均匀度计算方法对选取的多点观测资料进行计算,提取综合指标。结果表明M≥6级地震前水氡、水汞的群体异常较为显著,水汞对M≥5.5级地震具有较好的预报效能,而水氡的群体异常的预测能力对M≥6.0级地震才能通过检验,水汞异常的灵敏度比水氡高。

Individual short-term anomalies of radon and mercury content in groundwater in Siehuan-Yunnan region are obtained by using slope k and correlation coefficient r. Synthetical indexes are achieved by calculating the selected observation data with the method of group inhomogeneity. It shows that group anomalies of radon and mercury content in groundwater are remarkable before the earthquakes with M≥6.0. mercury content in groundwater has satisfactory prediction efficiency to earthquakes with M≥5.5, while radon content in groundwater can satisfactorily predict earthquakes with M≥6.0. Anomalies of mercury content in groundwater are more sensitive than those of radon content in groundwater.