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Zhang Zhili, Wang Chengbao, Fang Xing, Yan Hongcom sh. 1989: AN ECHELON FRACTURE MODEL FOR THE TANGSHAN EARTHQUAKE SEQUENCE AS WELL AS SIMULATION IN THEORY AND EXPERIMENT. Acta Seismologica Sinica, 11(3): 291-302.
Citation: Zhang Zhili, Wang Chengbao, Fang Xing, Yan Hongcom sh. 1989: AN ECHELON FRACTURE MODEL FOR THE TANGSHAN EARTHQUAKE SEQUENCE AS WELL AS SIMULATION IN THEORY AND EXPERIMENT. Acta Seismologica Sinica, 11(3): 291-302.
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AN ECHELON FRACTURE MODEL FOR THE TANGSHAN EARTHQUAKE SEQUENCE AS WELL AS SIMULATION IN THEORY AND EXPERIMENT

  • Institute of Geophysics, State Seismological Bereau

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  • Published Date: September 01, 2011
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    • Abstract
  • Based on the re-locating earthquake catalogue and more additional data,the focal mechanism solutions of the Tangshan earthquakes of Ms6.0 are computed again. Their rupture geometries and source parameters are also re-estimated by means of the new and old methods respectively. The aftershock seismicity in the period since the mainshock of 1976 to the end of 1984 is studied in some detail.The new results show that the focal mechanism solutions of the earthquakes of Ms=7.8 and Ms=7.1 become more similar to each other and their rupture directions are almost the same. The rupture length of the Ms = 7.8 earthquake is estimated as 77-87 km,and its northeastern end terminated in the region near Zhenzizhen,instead of extending to the region of I.ulong. According to the new results,a new mechanical model of echelon fractures with unequal lengths is presented in this paper. The theoretical and experimental results indicate that the echelon fracture model can simulate the fracture processes of the Tangshan earthquake better than other models. By using this model,more observed facts that could not be explained with other models,can be explained more satisfactorily.
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    • References (1)
  • [1] 国家地震局科研处,1981,唐山地震考察与研究.地震出版社.

    [2] 国家地震局《一九七六年唐山地震》编辑组,1982.一九七六年唐山地震.地震出版社.

    [3] 邱群,1976,1976年7月28日河北省唐山7.8级地震的发震背景及其活动性.地球物理学报,19,259——269.

    [4] 陈运泰、黄立人、林邦慧、刘妙龙、王新华,1979.用大地测量资料反演的1976年唐山地震的位错模式.地球物理学报:22,201——216.

    [5] 马宗晋、博征祥、张邓珍、汪成民、张国民、刘德富,1982.一九六六—一九七六年中国九大地震,地震出版社.

    [6] Butler, R., Stenart, G.S, and Kanamori, H., 1979. The July 27, 197G Tangshan China Earthquake——a complex sequence of intraplate events. Bttll. Seism. Soc. Anxer., 69,207——220.

    [7] 张之立、李钦祖、谷继成、靳雅敏、杨憋源、刘万琴,1980,唐山地震的破裂过程及其力学分析.地震学报,2,111——129.

    [8] 张之立,1984,唐山地震破裂过程的三维分析.地震学报,6,22——28.

    [9] 张之立、方兴,1988.研究地震破裂过程的一种新方法及其应用.地震学报,10,1——10,

    [10] 张之立、刘新美,1982, 1970年1月5日云南通海地震的震源特证.地球物理学报,25, 440——447.

    [11] 于新昌、靳雅敏,1986,唐山地震序列的空间活动指数.华北地震科学,4,127——134.

    [12] 刘力强、马瑾、吴秀泉,1986,雁列式断层变形与失稳过程的实验研究.地震学报,8,393——403,

    [13] 张之立、方兴,1987,断裂构造体系的形成和扩展过程的力学分析及应用.中国科学,B辑,11; 1214——1224.

    [14] 陈顺、郑捷、郭继光、阎虹,1989,脉冲激光全息干涉术在岩石力学研究中的应用.科学通报,10: 609——611

    [1] 国家地震局科研处,1981,唐山地震考察与研究.地震出版社.

    [2] 国家地震局《一九七六年唐山地震》编辑组,1982.一九七六年唐山地震.地震出版社.

    [3] 邱群,1976,1976年7月28日河北省唐山7.8级地震的发震背景及其活动性.地球物理学报,19,259——269.

    [4] 陈运泰、黄立人、林邦慧、刘妙龙、王新华,1979.用大地测量资料反演的1976年唐山地震的位错模式.地球物理学报:22,201——216.

    [5] 马宗晋、博征祥、张邓珍、汪成民、张国民、刘德富,1982.一九六六—一九七六年中国九大地震,地震出版社.

    [6] Butler, R., Stenart, G.S, and Kanamori, H., 1979. The July 27, 197G Tangshan China Earthquake——a complex sequence of intraplate events. Bttll. Seism. Soc. Anxer., 69,207——220.

    [7] 张之立、李钦祖、谷继成、靳雅敏、杨憋源、刘万琴,1980,唐山地震的破裂过程及其力学分析.地震学报,2,111——129.

    [8] 张之立,1984,唐山地震破裂过程的三维分析.地震学报,6,22——28.

    [9] 张之立、方兴,1988.研究地震破裂过程的一种新方法及其应用.地震学报,10,1——10,

    [10] 张之立、刘新美,1982, 1970年1月5日云南通海地震的震源特证.地球物理学报,25, 440——447.

    [11] 于新昌、靳雅敏,1986,唐山地震序列的空间活动指数.华北地震科学,4,127——134.

    [12] 刘力强、马瑾、吴秀泉,1986,雁列式断层变形与失稳过程的实验研究.地震学报,8,393——403,

    [13] 张之立、方兴,1987,断裂构造体系的形成和扩展过程的力学分析及应用.中国科学,B辑,11; 1214——1224.

    [14] 陈顺、郑捷、郭继光、阎虹,1989,脉冲激光全息干涉术在岩石力学研究中的应用.科学通报,10: 609——611
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