唐山地震前的断层滑动及有关的倾斜和水位变化

李兴才

李兴才. 1983: 唐山地震前的断层滑动及有关的倾斜和水位变化. 地震学报, 5(1): 73-78.
引用本文: 李兴才. 1983: 唐山地震前的断层滑动及有关的倾斜和水位变化. 地震学报, 5(1): 73-78.
1983: FAULT SLIPPING BEFORE THE 1976 f ANGSHAN EARTHQUAKE AND ITS RELATED VARIATIONS OF GROUND SURFACE TILTING AND GROUND WATER LEVEL. Acta Seismologica Sinica, 5(1): 73-78.
Citation: 1983: FAULT SLIPPING BEFORE THE 1976 f ANGSHAN EARTHQUAKE AND ITS RELATED VARIATIONS OF GROUND SURFACE TILTING AND GROUND WATER LEVEL. Acta Seismologica Sinica, 5(1): 73-78.

唐山地震前的断层滑动及有关的倾斜和水位变化

FAULT SLIPPING BEFORE THE 1976 f ANGSHAN EARTHQUAKE AND ITS RELATED VARIATIONS OF GROUND SURFACE TILTING AND GROUND WATER LEVEL

  • 摘要: 分析了1976年唐山地震前趋势性的倾斜和水位变化.用传播的断层滑动模式计算了它们的理论波形,得出,除唐山附近的蠕动断层段外,在宁河附近还有一蠕动断层段,断层滑动在地面1公里之下进行,它于1975年2、3月份在塘沽和宁河之间开始,以后沿大致唐山断裂的方向(N30E)逐渐向北东方向扩展,滑动区前沿的传播速率为4——5公里/月,同时位移由0逐步增长到1米左右.最后讨论了唐山地震的震源过程,认为唐山地震(地震滑动)是南北两个蠕动断层段逐步逼近,最终连接致使位移率迅速增长的结果.
    Abstract: In analysing the trend of variations of tilting of the ground surface and the ground water level observed before the 197 6 Tangshan earthquake, their theoretical wave form have been calculated based on a propagating slipping fault model. They indicate that besides the creeping fault segment nearby Tangshan, there also exists another such segment nearby Ninghe to the southwest. Slipping took place below depth of about 1 km. The latter segment started to creep on a portion between Tanggu, futher to the southwest and Ninghe in February and March, 1975. Then along the direction of the Tangshan fault, N30E, it propagated gradually toward the northeast at a rate of 4-5km/month. Meanwhile the fault displacement increased from 0 to about 1 meter. It is believed that the process of development of the Tangshan earthquake consists of the gradual approach of two creeping fault segments, north and south, toward each other, and finally they met with a quick increase of the rate of displacement of the fault.
  • [1] 郑治真等,根据地下水资料的数字滤波探讨唐山大震的孕育过程,地球物理学报,22,3,267——280,1979.

    [2] 吴锦秀等,唐山地震地下水动态异常场特征与震源演化过程,地震地质,2,1, 67——78, 1980.

    [3] 陈运泰等,用大地测量资料反演的1976年唐山地震的位错模式,地球物理学报,23,3,201——216,1979,

    [4] 张郧珍,唐山地震前地壳的异常隆起及无震蠕动,地震学报,3,1, 11——22, 1981,

    [5] G. C. P. King etc., Detection of elastic strain field caused by fault creep events in Iran, Nature, 253,421——423. 1975.

    [6] E. Berg and W. Lutschak, Crustal tilt fields and propagation velocities associated with earthquakes,Geophys. J. R. Astr. Soc., 35, 1——3, 5——29, 1973.

    [7] C. F. Mortensen, R. C. Lee, and R. O. Burford, Observations of creep——related tilt, Strain and water level changes on the central San Andreas fault, Bull. Seism. Soc. Am., 67, 641——649, 1977.

    [8] T. Nagamune, Time characteristics of crustal deformation of the Yunnan earthquake of May 29, 1976, as inferred from tilt recording, J. Phys. Earth., 25, 2, 209——218, 19T7,

    [9] 李兴才,陈运泰,唐山地震引起的剩余倾斜场的空间分布和倾斜阶跃,地球物理学报,25,3,219——226,1982.

    [1] 郑治真等,根据地下水资料的数字滤波探讨唐山大震的孕育过程,地球物理学报,22,3,267——280,1979.

    [2] 吴锦秀等,唐山地震地下水动态异常场特征与震源演化过程,地震地质,2,1, 67——78, 1980.

    [3] 陈运泰等,用大地测量资料反演的1976年唐山地震的位错模式,地球物理学报,23,3,201——216,1979,

    [4] 张郧珍,唐山地震前地壳的异常隆起及无震蠕动,地震学报,3,1, 11——22, 1981,

    [5] G. C. P. King etc., Detection of elastic strain field caused by fault creep events in Iran, Nature, 253,421——423. 1975.

    [6] E. Berg and W. Lutschak, Crustal tilt fields and propagation velocities associated with earthquakes,Geophys. J. R. Astr. Soc., 35, 1——3, 5——29, 1973.

    [7] C. F. Mortensen, R. C. Lee, and R. O. Burford, Observations of creep——related tilt, Strain and water level changes on the central San Andreas fault, Bull. Seism. Soc. Am., 67, 641——649, 1977.

    [8] T. Nagamune, Time characteristics of crustal deformation of the Yunnan earthquake of May 29, 1976, as inferred from tilt recording, J. Phys. Earth., 25, 2, 209——218, 19T7,

    [9] 李兴才,陈运泰,唐山地震引起的剩余倾斜场的空间分布和倾斜阶跃,地球物理学报,25,3,219——226,1982.

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  • 发布日期:  2011-08-31

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