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Zhang J J，Chen L，Li Y L，Liu M S，Shi S W，Yi J S，Zhang W，Zhang S L，Sun J H，Yang D，Xian J L，Cai J J. 2023. Development characteristics and controlling factors of co-seismic geo-hazards triggered by the Luding MS6.8 earthquake on September 5，2022. Acta Seismologica Sinica，45（2）：167−178. DOI: 10.11939/jass.20220215
Citation: Zhang J J，Chen L，Li Y L，Liu M S，Shi S W，Yi J S，Zhang W，Zhang S L，Sun J H，Yang D，Xian J L，Cai J J. 2023. Development characteristics and controlling factors of co-seismic geo-hazards triggered by the Luding MS6.8 earthquake on September 5，2022. Acta Seismologica Sinica，45（2）：167−178. DOI: 10.11939/jass.20220215
shu

Development characteristics and controlling factors of coseismic geohazards triggered by the Luding MS6.8 earthquake occurred on September 5，2022

  • 1.

    Institute of Exploration Technology，Chinese Academy of Geological Sciences，Chengdu 611734，China

  • 2.

    Technology Innovation Center for Risk Prevention and Mitigation of Geohazard，Ministry of Natural Resources，Chengdu 611734，China

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  • Received Date: November 24, 2022
  • Revised Date: December 16, 2022
  • Available Online: January 03, 2023
  • Published Date: March 14, 2023
    Graphical Abstract
    • Abstract
  • Based on the field investigation of the Luding MS6.8 earthquake occurred on September 5, 2022, combined with the remote sensing interpretation, the development characteristics and controlling factors of coseismic geohazards triggered by the Luding earthquake are summarized, and the evolution trend of coseismic geohazards is studied and judged. According to the different phases of prevention and mitigation of coseismic geohazards, corresponding suggestions are given in order to benefit the prevention and control of geohazards. The results show that the coseismic geohazards of the Luding earthquake are mainly small-medium-sized collapses and landslides, which are concentratedly distributed in three areas: Moxi town and Hailuogou valley, Wandong village of Detuo town and both banks of Daduhe river in Detuo town. Mainshock and aftershocks, Xianshuihe active fault, topography, special rock and sediment mass are the main controlling factors for spatial distribution of coseismic landslides triggered by the Luding earthquake. The geohazards after Luding earthquake will be extremely active in the next 10 years. It is necessary to pay close attention to the high-locality and steep slopes on both banks of the Moxihe river and its tributaries, the Daduhe river, the high-locality terrace along the Daduhe river, the edge area around the Moxi platform, and the debris flows in Moxi town and Detuo town where coseismic landslides are densely developed. Therefore, according to the management logic of emergency prevention of coseismic geohazards, it is suggested that local governments should follow the three phases of detailed investigation, restoration and reconstruction, and long-term planning to carry out geohazard prevention and mitigation work.
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