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Title:: Far-field Response of Ground Water to West Kunlun Mts.Pass M_S8.1 Earthquake

Author(s):: DU Fang; WU Jiang; (Earthquake Administration of Sichuan Province, Chengdu 610041, Sichuan, China)

Keywords:: West Kunlun Mts.Pass M_S8.1 earthquake; underground fluid; far-field response; Sichuan area

摘要:: 通过对2001年11月14日中国西部昆仑山口西8.1级地震引起的川滇块体内四川地区地下流体远场响应的分析研究,得到了地下流体在四川地区表现出的远震响应的分区特征。探讨了四川地区地下流体远场响应与区域构造、活动断裂以及断裂带间相互作用和昆仑山口西8.1级地震远场构造的相互联系,分析了四川地区地下流体远场响应表现出的对远震的孕震、震时和震后响应的阶段性特征,认为地下流体远场响应所包含的远震“孕震响应”、“震时响应”和“震后响应”,正是昆仑山口西8.1级地震在孕育—发展—发生的全过程中在震源外的远场反映。

Abstract:: The ground water level and temperature in the Sichuan area of Sichuan-Yunnan Block showed far-field response to the West Kunlun Mts.Pass M_S8.1 earthquake on Nov. 14, 2001. We discuss the correlation between the regional tectonics in the Sichuan area and the seismogenic tectonic of the distant earthquake, and analyze the characteristics of the far-field response by zone and by stage.We think that the stages of seismogenic, coseismic and postseismic responses in the Sichuan area are just a far-field reflection of the whole process of the West Kunlun Mts.Pass M_S8.1 earthquake from preparation to development and to occurrence.