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HUANG ZHONG-XIAN, WANG EN-FU, LIU CHANG-YIHE, CHENG-EN, ZHANG BAO. 1980: DIRECTIONS OF TECTONIC STRESS AND SOLUTIONS OF EARTHQUAKE SOURCE MECHANISMS. Acta Seismologica Sinica, 2(2): 147-152.
Citation: HUANG ZHONG-XIAN, WANG EN-FU, LIU CHANG-YIHE, CHENG-EN, ZHANG BAO. 1980: DIRECTIONS OF TECTONIC STRESS AND SOLUTIONS OF EARTHQUAKE SOURCE MECHANISMS. Acta Seismologica Sinica, 2(2): 147-152.
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DIRECTIONS OF TECTONIC STRESS AND SOLUTIONS OF EARTHQUAKE SOURCE MECHANISMS

  • Seismotectonic Brigade, State Seismological Bureau

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  • Published Date: August 31, 2011
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  • The relations between the radiation pattern of seismic waves, focal mechanism solution and the directions of the tectonic stress are investigated with the aid of the results of two-dimensional model experiments. The radiation pattern of seismic waves is dependent on the form of motion of the medium around the focus at the time of earthquake which is connected not only with the pre-existing stress before earthquake but also with other factors such as the geological conditions within the focal region. Based on the experimental results of rock mechanics as well as the results of our experiments, it can be assumed that the direction of the principal compres-sive tectonic stress is closer to the fault plane than the direction of principal com-pressive stress of release deduced from the focal mechanism solution.
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    • References (1)
  • [1] D. P. Mckenzie, The relation between fault plane solutions for earthquake and the directions of the principal stresses, Bull. Seism. Soc. Amer., 59, 2, 591—601., 1969.
    [2] Yamakawa, Stress fields in focal regions, , J. Phys. Earth., 19, 4, 347—355, 1971.
    [3] В.И. 克依利斯—博罗克等, 地震机制的研究, 第一部分, 第二章, 李宗元译, 科学出版社, 1961.
    [4] N. A. Haskell, Total energy and energy spectral density of elastic wave radiation from propagating faults, Bull. Seism. Soc. Amer, 54, 1811—1841, 1964.
    [5] 顾浩鼎等, 1975年2月4日辽宁省海城地震的震源机制, 地球物理学报, 19, 4, 270—285, 1976.
    [6] C. B. Raleigh et. al. Faulting and crustal stress at Rangely, Colorado, Appendix, in: Flow and Fracture of Bocks, H. C. Heard et. al.(ed).Washington, D. C., 282, 1972.
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