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1982: DURATION OF THE SEQUENCE OF STRONG AFTERSHOCKS OF A MAJOR EARTHQUAKE. Acta Seismologica Sinica, 4(4): 394-403.
Citation: 1982: DURATION OF THE SEQUENCE OF STRONG AFTERSHOCKS OF A MAJOR EARTHQUAKE. Acta Seismologica Sinica, 4(4): 394-403.
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DURATION OF THE SEQUENCE OF STRONG AFTERSHOCKS OF A MAJOR EARTHQUAKE

  • Center of Analysis and Prediction, State Seismological Bureau

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  • Published Date: August 31, 2011
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  • In this paper, the durations of the sequence of strong aftershocks of 21 shallow major earthquakes, M6.0, occurred in North and Southwest China during 1966-1980 have been discussed, giving some empirical results as follows:(1) The duration △T of such sequences are not the same and they do not seem to be related to the magnitudes of the main shocks.(2) △T's are related to the overall attenuation coefficient (p) of the aftershock frequency of the entire earthquake sequence. For the sequence with p>1, △T150 days and the sequence of strong aftershocks ends at about an inflection point of the attenuation curve of aftershock frequency.There are inevitably exceptions to the empirical relations thus obtained because of the extremely complicated nature of the problem.
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    • References (1)
  • [1] T. Utsu,A statistical study on the occurrence of aftershocks, Geophysical Magazine,30, 4, 521——605,1961.

    [2] C. F. Richter, Elementary Seismology, San Francisco, 1958.

    [3] 谷继成等,强余震的时空分布规律及其理论解释,地球物理学报,22, 1, 34——46, 1979,

    [4] 王碧泉等,强余震的准周期性,地震学报,1, 2, 154——165, 1979,

    [5] 傅征祥,1978年5月18日海城6.0级地震前地震活动的某些特征,地震学报,3, 2, 118——125, 1981,

    [1] T. Utsu,A statistical study on the occurrence of aftershocks, Geophysical Magazine,30, 4, 521——605,1961.

    [2] C. F. Richter, Elementary Seismology, San Francisco, 1958.

    [3] 谷继成等,强余震的时空分布规律及其理论解释,地球物理学报,22, 1, 34——46, 1979,

    [4] 王碧泉等,强余震的准周期性,地震学报,1, 2, 154——165, 1979,

    [5] 傅征祥,1978年5月18日海城6.0级地震前地震活动的某些特征,地震学报,3, 2, 118——125, 1981,
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