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ZHU CHENG-NAN, LIU YU-QUAN. 1980: ON THE QUADRANT PATTERN OF STRAIN DISTRIBUTION OF THE TONGHAI AND DONGCHUAN EARTHQUAKES, YUNNAN PROVINCE. Acta Seismologica Sinica, 2(3): 321-331.
Citation: ZHU CHENG-NAN, LIU YU-QUAN. 1980: ON THE QUADRANT PATTERN OF STRAIN DISTRIBUTION OF THE TONGHAI AND DONGCHUAN EARTHQUAKES, YUNNAN PROVINCE. Acta Seismologica Sinica, 2(3): 321-331.
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ON THE QUADRANT PATTERN OF STRAIN DISTRIBUTION OF THE TONGHAI AND DONGCHUAN EARTHQUAKES, YUNNAN PROVINCE

  • Seismological Bureau of the Yunman, Province

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  • Published Date: August 31, 2011
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  • In this paper, the strain distribution around the epicentral regions of the 1970 Tonghai Earthquake, M=7.7 and the 1965 DongChuan Earthquake, M=6.5, Yunnan Province, has been studied. It is found that the tensional and compressional areas of the earthquakes distributed themselves in separate quadrants. Before the DongChuan earthquake, there were tensional and compressional areas in the block west of the earthquake fault. The phenomenon has been interpreted on the basis of the elastic rebound theory and its significance in earthquake prediction discussed.In addition, the authors also give a brief account on the possibility of observing the phenomenon of quadrant pattern of strain distribution with respect to the time range before the earthquakes and the areal extent around the epicenters.
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  • [1] 国家地震局地震测量队, 用1970年云南通海地震地形变特征, 地球物理学报, 18, 4, 240—245, 1975.

    [2] 王椿铺、朱成男、刘玉权, 用地形变资料测定通海地震的地震断层参数, 地球物理学报, 21, 191—198, 1978.

    [3] 陈运泰、林邦慧、林中洋、李志勇, 根据地面形变的观测研究1966年邢台地震的震源过程, 地球物理学报, 18, 3, 164—182, 1975.

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    [5] 郭增建、秦保燕、徐文耀、汤泉, 震源孕育模式的初步探讨, 地球物理学报, 16, 3, 1973.

    [6] 蜀水, 震源应力场、岩石膨胀性和扩散作用, 地球物理学报, 19, 3, 1973.

    [7] 朱成男、陈承照, 1974年云南省昭通地震破裂机制, 地球理学报, 19, 4, 1976.

    [8] F. Press, Displacements strains and tilts at teleseismic distance, J. G. R., 70, 10, 2395—2412, 1965.

    [9] L. Mansinha and D. E. Smylie, The displacament field of inclined faults, Bull. Seism. Soc. Amer., 61, 5, 1433—1440, 1971.

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    [11] M. Ando, Seismo—tectonics of the 1923 kanto earthquake, J. Phys. Earth, 22, 2, 363—377, 1974.
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