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EARTHQUAKE ›› 2021, Vol. 41 ›› Issue (3): 131-143.doi: 10.12196/j.issn.1000-3274.2021.03.010

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The Relationship between the Co-seismic Response Capability of Well Water Level and the Surrounding Earthquake

CUI Jin1, SI Xue-yun1, SUN Xiao-long2, ZENG Xian-wei1, DING Feng-he1   

  1. 1. Earthquake Administration of Ningxia, Yinchuan 750001, China;
    2. Institute of Crustal Dynamics of China Earthquake Administration, Beijing 100085, China
  • Received:2020-01-03 Revised:2020-04-26 Online:2021-07-31 Published:2021-11-02

Abstract: We chose 5 wells in Ningxia and analyzed the co-seismic groundwater level responses to earthquakes that above 5.0 in mainland China and 7.0 in the world between 2013 to 2018. We summarized the characteristics of each well and got two points. One is the range of earthquake recorded by well water level, it means the threshold range of magnitude and distance causing co-seismic response of well water level. The other is coseismic characteristics of each observation well. Combining with these two points, we could get co-seismic response capability of well water level change over time. The data results show that there is a well water level co-seismic threshold range of earthquake magnitude and distance in Ningxia, and expressed by seismic energy density, it is about 10-4 J/m3. The method of combining the two points improves the time resolution, compared with the previous one, and when the water level co-seismic capacity changes, the probability of more than 4.5 earthquakes occurring in the vicinity of the well is higher.

Key words: Co-seismic groundwater level responses, Seismic energy density, Co-seismic response capability

CLC Number: