【摘要】 对张北 6 .2级地震前廊坊市区域内 4口浅井的水位变差研究表明 ,这 4口井的水位变差在张北地震前显示出明显的中期和中短期异常变化 ,存在着“正值上升→下降→负值→地震”的规律。认为浅井水位作为一种附加力源 ,以流体载荷、孔隙压力、化学腐蚀的形式作用于地壳岩石 ,对张北地震的发生起到了促进作用。更多还原

【Abstract】 The study on the variation in groundwater level of the 4 shallow wells in Langfang region before Zhangbei M6.2 earthquake indicates that the variation difference in water level of the 4 wells shows clearly medium and short term anomalies.Their common character is increasing with positive value,decreasing,negative value,and then earthquake.We believe,as a additional force source,water level of shallow well acts on the crustal rock in form of fluid loading,pore pressure and chemical erosion,which promotes the Zhangbei earthquake.更多还原