Obvious anomalies of Wuji well in Hebei Province, which generally occurred within 3 months before earthquakes, were obtained through the wavelet transform analysis in this paper. The minute data of digital water level of Wuji well and the global M ≥ 5.0 seismic data from 2011 to 2018 were analyzed. The results showed that Wuji well has good co-seismic response ability to global M ≥ 7.0 earthquakes, and the response forms to different earthquakes are oscillatory water-level seismic waves. Well-aquifer observation system, seismic magnitude, and well-hypocenter distance are important factors affecting the effect of water-level seismic wave recording. The type of focal mechanism may influence the effect of water-level seismic waves. A further analysis of the relationship between water-level seismic wave and seismic wave showed that R wave causes the largest change of water level. The wavelet transform results showed that there is obvious high-frequency abnormal information in the detailed analysis of water level before large earthquakes. In this paper, the previous research on the mechanism of water level oscillation was comprehensively analyzed, and the relevant mechanism was preliminarily discussed in combination with the specific situation of Wuji well.
董博,纪春玲,周安聘,张环曦,赵雨晨,李凤,章阳,王时.河北无极井同震响应特征分析[J].地震工程学报,2021,43(5):1077-1086. DONG Bo, JI Chunling, ZHOU Anpin, ZHANG Huanxi, ZHAO Yuchen, LI Feng, ZHANG Yang, WANG Shi. Co-seismic response characteristics ofWuji well in Hebei Province[J]. China Earthquake Engineering Journal,2021,43(5):1077-1086.复制