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1982年10月19日,河北卢龙发生5.3级地震,远离震中130公里的天津汉沽普遍有感。汉1井水位在震前出现了明显的前兆性异常。 汉1井位于北东向沧东断裂和北西向蓟运河断裂交汇处。井孔深3303米。套管总长3289.32米。射孔层位在2688至2712.6米之间。含水层属于下第三系沙河街组的粉砂、细砂岩,其上覆盖泥岩,封闭较好。 该井1978年8月完井,1982年7月投入观测,采用红旗-1型自记水位仪记录。由于
On October 19, 1982, a 5.3-magnitude earthquake struck Lulong, Hebei Province, and there was a general feeling in Hangu of Tianjin, 130 kilometers away from the epicenter. Well Han 1 showed obvious precursor anomalies before the earthquake. Well Han-1 is located at the intersection of the NE-trending Cangdong fault and the NW-trending Jiyunhe fault. Well hole 3303 meters deep. The total length of the casing is 3289.32 meters. Perforation level in the 2688 to 2712.6 meters. The aquifer belongs to the silt and fine sandstone of the Shahejie Formation in the Lower Tertiary. The mudstone is covered by the aquifer, and the closure is better. Completed in August 1978, the well was put into observation in July 1982 and recorded using the Hongqi-1 self-recorded water level meter. due to