黄骅井水位映震效能分析

The efficiency search of water level in Huanghua well

收集整理河北省地下流体观测井网黄骅井水位对2004年以来全球MS≥8.0地震的同震响应资料,从响应形态、响应幅度、响应时间等方面进行分析,并对黄骅井水位阶变异常进行分析。结果表明,黄骅井水位的同震响应形态以阶变为主;水位的同震响应幅度随震级增大而增大,但非单纯地随井震距的增大而减小;井震距越近震级越大,水位响应地震速度越快。分析认为,2015年以来黄骅井水位阶变异常可能与昌黎4.2级地震有一定相关性。

In our work,earthquake coseismic response data which was provided from the observation well pattern of underground fluid level of Hebei Province at Huanghua well,generated by the earthquake happened in the global MS higher than acuity 8.0 since 2004 are collected and analyzed.The analysis contained many aspects such as the response form,the response amplitude,response time and so on.We also analysed the anomaly step change of water level of Huanghua well.As the results,the form of coseismic response of water level in Huanghua well is mainly performed by step variable.The water level of coseismic response amplitude increases with the growth of the magnitude,but it does not simply decrease with increasing the epicentral distance.When the epicentral distance is similar,the magnitude of earthquake is greater,and the response of water level to the earthquake is faster.Since 2015,the level change of Huanghua well with abnormal status may have certain relevance with Changli M 4.2 earthquake.