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分析新疆10泉、04泉及哈萨克斯坦卡帕尔—阿拉善4井、下卡姆卡井氦气(He)含量变化的源兆、场兆、远兆的映震特征,地震前兆异常表现为:上升(或下降)幅度、速率变化超出正常范围,具有较好的重复性,测值遵循背景值—趋势性上升(或突升)—恢复至背景值;趋势性下降(或突降)—恢复至背景值的变化过程。各监测点氦气异常形态、异常持续时间、异常幅度同源兆、场兆、大震远兆没有明显的关系;由于各观测点的水文地质条件和地球化学环境不同,不同监测点氦气映震能力有较大差异,其中新10号泉和卡帕尔—阿拉善4井氦气的映震能力较强。
The source, meteorological and epicenters of the Hekang-10 well, the Izumi-4 spring and the Karpair-Alashan 4 well in Kazakhstan were analyzed. The anomalies of the earthquake precursors were : Rising (or falling) amplitude, rate of change out of the normal range, with good repeatability, measured values follow the background value - rising trend (or sudden rise) - recovering to the background value; declining trend (or sudden drop) Revert to the change of background value. Due to the different hydrogeological conditions and geochemical environments at different monitoring points, the helium gas reflectance at different monitoring points was not significantly different from that of other monitoring sites The seismic capacity is quite different. Among them, the new 10 and the Kapal-Alashan 4 wells have stronger seismic reflection ability.