Journal of Jilin University(Earth Science Edition) ›› 2021, Vol. 51 ›› Issue (1): 286-295.doi: 10.13278/j.cnki.jjuese.20200010

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Activity and Seismic Risk Assessment of Main Faults in Liaoning Area

Cao Fengjuan, Jia Lihua, Li Mengying, Wang Songyang   

  1. Seismological Bureau of Liaoning Province, Shenyang 110034, China
  • Received:2020-01-10 Published:2021-02-02
  • Supported by:
    Supported by the Social Research and Industrialization Project of Liaoning Province (2017231013) and the Special Items of Basic Scientific Research Business, Institute of Earthquake Forecasting,CEA(2018IEF010203)

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Abstract: Based on the geometric features and spatial distribution of the major active faults in Liaoning Province, the earthquakes with frequency of ML≥2.0 in Liaoning since 1980 and the earthquakes with annual occurrence rate of Ms≥5.0 since 1900 were studied,their relationship with the tectonic settings of the active faults were analyzed, and the preliminary evaluation results of the seismicity and seismic risk of the main faults and tectonic zones were obtained. The main tectonic faults with high activity are Haicheng River fault, Jiuzhai-Gaizhou north section of Jinzhou fault, Chaoyang-Beipiao fault, etc.; the faults with relatively high risk of Ms≥5.0 earthquake in the next 3 years are Haicheng River fault, Xiongyue fault, Jiuzhai-Zhuanghe fault, Yalu River fault, the intersection of Chifeng-Kaiyuan fault, and Liuhe fault, etc. It is suggested that not only the spatial distribution of the precursory anomalies, but also the activity and seismic risk of the main structures in the region should be fully considered in the regional earthquake risk and hazard assessment.

Key words: active fault, earthquake frequency, space distribution, risk assessment, Liaoning area

CLC Number: 

  • P315
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