河北黄骅井水位阶变异常研究
Study of Water-level Step-variation Anomaly at Huanghua Well

收集整理河北省地下流体观测井网黄骅井2005年以来的水位资料，结合周边的河间井和衡水井的水位资料，以河北昌黎4.2级地震为例，对黄骅井水位阶变异常进行分析。结果表明：2015年以来黄骅井水位阶变异常与其周边的河间井和衡水井的水位异常变化有一定的对应关系，水位阶变是构造活动引起的，与昌黎4.2级地震有一定的相关性，是一次短期前兆异常。
In this study, we collected and analyzed water-level data of the Huanghua well in Hebei Province observed since 2005. We then combined the water-level data of the surrounding Hejian and Hengshui wells to analyze the water-level step-variation anomaly of the Huanghua well, taking the Changli M4.2 earthquake in Hebei as an example. The results show that the earthquake reflection ability of the water level of the Huanghua well is good. Since 2015, the water-level step-variation anomaly of the Huanghua well and the water-level anomalies in the Hejian and Hengshui wells have shown a certain correspondence. As a short-term precursor anomaly, water-level change is caused by tectonic activity, which is related to the Changli M4.2 earthquake.