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XU ZHONGHUAI, YAN MING, ZHAO ZHONGHEcom sh advance. 1983: EVALUATION OF THE DIRECTION OF TECTONIC STRESS IN NORTH CHINA FROM RECORDED DATA OF A LARGE NUMBER OF SMALL EARTHQUAKES. Acta Seismologica Sinica, 5(3): 268-279.
Citation: XU ZHONGHUAI, YAN MING, ZHAO ZHONGHEcom sh advance. 1983: EVALUATION OF THE DIRECTION OF TECTONIC STRESS IN NORTH CHINA FROM RECORDED DATA OF A LARGE NUMBER OF SMALL EARTHQUAKES. Acta Seismologica Sinica, 5(3): 268-279.
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EVALUATION OF THE DIRECTION OF TECTONIC STRESS IN NORTH CHINA FROM RECORDED DATA OF A LARGE NUMBER OF SMALL EARTHQUAKES

  • Institute of Geophysics, State Seismological Bureau

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  • Published Date: August 31, 2011
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    • Abstract
  • Based on the first motion polarization records of earthquakes with magnitude less than 5 obtained from local Seismological stations in North China during the period of 1966 -1978, the directions of the principal axes of crustal tectonic stress in 13 subregions are inferred by computing the composite nodal plane solutions.A numerical computation test shows the possibility of inferring the principal axes of tectonic stress from the P, B, T axis of earthquakes with randomly oriented fault planes. The advantage of using microearthquake polarity data over using the data from large earthquakes in estimating the direction of tectonic stress is argued. By use of the trial and error method, the 3-dimensional parameter space of all possible average nodal plane solutions is tested with the scan step of 555, the computation time is saved by improving the program.
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    • References (1)
  • [1] 李钦祖,华北地壳应力场的基本特征,地球物理学报,23, 4, 376——388, 1980.

    [2] L. Zobaek and M. Zoback, State of Stress in the Conterminous United Sbatea. J. Geophys.Res., 85,B11, 6113——6156, 1980.

    [3] 李钦祖等,由单台小地震资料所得两个区域的应力场,地球物理学报,16,49——61,1973.

    [4] 许忠淮等,京、津、唐、张地区地震应力场的方向特征,地震学报,1, 2,121——132,1979.

    [5] S. Guinn and L. T. Long, A Computer Method for Determination of Valid Pocal Mechauiama Using P——wave First Motions, Eartleq. Notes, 48, 4, 21——33, 1977.

    [6] D. P. Mekenzie. The Relationship between Fault Plane Solutions for bona of the Principal Stresses, Bull. Seismol. Soc. Amer, 59 591——601,1969.

    [7] N. Yamakawa, Stress Fields in Fields in Focal Regions, J. Phys. Earth, 19, 347——353,1971.

    [8] A. J. Pope, Fiducial Regions for Body Wave Focal Plane. Solutions, GeoPhyhs. J. R. Astr. Soc. 30,331——342,1972.

    [1] 李钦祖,华北地壳应力场的基本特征,地球物理学报,23, 4, 376——388, 1980.

    [2] L. Zobaek and M. Zoback, State of Stress in the Conterminous United Sbatea. J. Geophys.Res., 85,B11, 6113——6156, 1980.

    [3] 李钦祖等,由单台小地震资料所得两个区域的应力场,地球物理学报,16,49——61,1973.

    [4] 许忠淮等,京、津、唐、张地区地震应力场的方向特征,地震学报,1, 2,121——132,1979.

    [5] S. Guinn and L. T. Long, A Computer Method for Determination of Valid Pocal Mechauiama Using P——wave First Motions, Eartleq. Notes, 48, 4, 21——33, 1977.

    [6] D. P. Mekenzie. The Relationship between Fault Plane Solutions for bona of the Principal Stresses, Bull. Seismol. Soc. Amer, 59 591——601,1969.

    [7] N. Yamakawa, Stress Fields in Fields in Focal Regions, J. Phys. Earth, 19, 347——353,1971.

    [8] A. J. Pope, Fiducial Regions for Body Wave Focal Plane. Solutions, GeoPhyhs. J. R. Astr. Soc. 30,331——342,1972.
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