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JIN YAMINup, CHEN YUNTAIup2, YU XINCHANGup. 1982: SOURCE PARAMETERS OF THE AFTERSHOCKS AND THE QUALITY FACTOR OF THE CRUSTAL MEDIUM UNDER THE TANGSHAN AREA. Acta Seismologica Sinica, 4(1): 62-67.
Citation: JIN YAMINup, CHEN YUNTAIup2, YU XINCHANGup. 1982: SOURCE PARAMETERS OF THE AFTERSHOCKS AND THE QUALITY FACTOR OF THE CRUSTAL MEDIUM UNDER THE TANGSHAN AREA. Acta Seismologica Sinica, 4(1): 62-67.
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SOURCE PARAMETERS OF THE AFTERSHOCKS AND THE QUALITY FACTOR OF THE CRUSTAL MEDIUM UNDER THE TANGSHAN AREA

  • 1. Seismologieal Bureau of Hebei Province; 2. Institute of Geophysics, State Seismologieal Bureau

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  • Published Date: August 31, 2011
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    • Abstract
  • The source parameters of aftershocks and the Q values of the crustal medium under the Tangshan aftershock area are estimated from respectively the half cycles and amplitudes of the first P arrivals of Tangshan aftershocks. The results obtained indicate that the stress drop gradually increases with distance from 2 bars at Tangshan and vicinity toward the northeast and southwest to a maximum of 34 bars. A tentative explanation has been proposed for the relation between the occurrence of the aftershocks and the distribution of quality factors of crustal medium.
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    • References (1)
  • [1] M. E. 0'neill, and J. H. Healy, Determination of source parameters of small earthquakes from P——wave rise time, BuLI, seerm. soc. diner, 63. 2, 599——614, 1973.

    [2] 陈运泰等,巧家、石棉的小震震源参数的测定及其地震危险性的估计,地球物理学报,19, 3, 206——283,1976.

    [3] T. G. Rautian, V. I. ghalturin, Y. G. Martynov and P. Molnar, Preliminary analysis of the spectral content of P and S waves from local earthquakes in the Garm, Tadjikiatan region, Bull. seism. Soc. din., 68, 4, 949——971.

    [4] 张之立等,唐山地震的破裂过程及其力学分析,地震学报,2, 2, 1980,

    [5] 朱传镇等,唐山7.8级地展前后微展震源参数,地球物理学报,20, 4, 1977,

    [1] M. E. 0'neill, and J. H. Healy, Determination of source parameters of small earthquakes from P——wave rise time, BuLI, seerm. soc. diner, 63. 2, 599——614, 1973.

    [2] 陈运泰等,巧家、石棉的小震震源参数的测定及其地震危险性的估计,地球物理学报,19, 3, 206——283,1976.

    [3] T. G. Rautian, V. I. ghalturin, Y. G. Martynov and P. Molnar, Preliminary analysis of the spectral content of P and S waves from local earthquakes in the Garm, Tadjikiatan region, Bull. seism. Soc. din., 68, 4, 949——971.

    [4] 张之立等,唐山地震的破裂过程及其力学分析,地震学报,2, 2, 1980,

    [5] 朱传镇等,唐山7.8级地展前后微展震源参数,地球物理学报,20, 4, 1977,
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