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EARTHQUAKE ›› 2023, Vol. 43 ›› Issue (2): 14-24.doi: 10.12196/j.issn.1000-3274.2023.02.002

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The Deep-well Geo-electrical Synthesis Observation System of Tianshui Station and Its Monitoring Efficiency Analysis

NIU Yan-ping1,2, TIAN Ye1,2, ZHANG Yuan-fu1,2, ZHOU Wei-dong1,2   

  1. 1. Gansu Earthquake Agency, Lanzhou 730000, China;
    2. Lanzhou Institute of Seismology, China Earthquake Administration, Lanzhou 730000, China
  • Received:2022-11-23 Revised:2023-02-14 Published:2023-07-05

Abstract: The Deep-well geo-electrical synthesis observation system of Tianshui station was completed in 2010. There are 20 components of earth resistivity observation item, 18 components of geo-electric field item and 6 components of geothermal gradient item in deep-well. These observation items were classified into target, comparative studying and experiment. This paper introduces the observation system and analyzes the efficiency of geo-electrical resistivity observation. The results prove that the deep-well geo-electrical resistivity observation experiments not only produce reliable data but also inhibiting interferences of electromagnetic, annual change, wind disturbance, rainfall and irrigation at ground. The anomalies have been found before the 2013 Lushan M7.0 and the 2013 Minxian-Zhangxian M6.6 earthquakes in the observation data.

Key words: Deep-well geo-electrical synthesis observation, Set observation item, Objective observation items, Observation efficiency

CLC Number: