哈萨克斯坦下卡姆卡5-T号井前兆异常特征

介绍了哈萨克斯坦的下卡姆卡5-T井的水文地球化学环境,对其15年来的交换资料进行了初步的统计与分析。结果表明,在震中距300 km、400 km范围内,5、6级地震的异常项目比例可达71.4%、51.4%,而7级大震(或6级震群)远兆的异常比例则仅为7.2%,且5级、6级和7级地震(或6级震群)在异常时间、异常形态上各有其特点和差异,部分5级地震还存在异常叠加的现象。各个观测项目的映震能力存在一定的差异。

ABNORMAL CHARACTER OF PRECURSOR OF SHAKAMUKA NO. 5-T WELL IN KAZAKSTAN

The article introduces hydrological and geochemical environment of Shakamuka No.5-T well in Kazakstan,and analyzes statistically fifteen years of exchanging data.The result shows that proportion of abnormal items with the magnitude of 5 and 6 is 71.4 percent and 51.4 per cent in the range of 300 km and 400 km from epicenter,and abnormal proportion of far-field precursor with the magnitude of 7(strong earthquake swarm with the magnitude of 6) is only(7.2) percent.Abnormal time points and shapes with the magnitude of 5,6 and 7(or earthquake swarm of M_S6) have different characters,and abnormities of some M_S 5 earthquakes appear superposed.Proportions of corresponding earthquakes of different observational items are different.