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以1997年11月8日西藏玛尼地震为例,通过三通差分干涉处理,获取了玛尼地震同震位移场.并在此基础上,采用弹性半空间介质中的位错模型,正演了玛尼地震发震断层某些几何学和运动学性质.结果表明:(1)发震断层两侧的变形场在垂向距断层110 km的区域仍受同震形变场影响.地表破裂带所造成的非相干性条带贯穿整个图像,长约110km.(2)发震断层最大水平位错达7.96 m.(3)发震断层可分为4段.其中中间两段所产生的变形场较大,长度分别为27和37 km,平均滑动值分别为6500和6000 mm,深度均为35km,前者是玛尼地震的主破裂面.西段和东段规模较小,长度分别为23和26km,前者滑动量为4000 mm,后者为5800 mm,两者深度分别为20和18km.
Taking the Mani earthquake in Tibet as an example, on November 8, 1997, the co-seismic displacement field of the Mani earthquake was obtained by means of three-way differential interference processing. On the basis of this, the dislocation model in elastic half-space was used to forward The results show that: (1) the deformation field on both sides of the seismogenic fault is still affected by the coseismic deformation field in the region 110 km vertically away from the fault, and the surface rupture zone The resulting incoherent strip runs through the entire image, about 110 km long. (2) The maximum horizontal dislocation of the seismogenic fault reaches 7.96 m. (3) The seismogenic fault can be divided into four segments, of which the deformation The larger ones are 27 and 37 km in length with average slip values of 6500 and 6000 mm respectively and the depths of 35 km, the former being the main rupture of the Mani earthquake with smaller scale and length of 23 And 26 km respectively, with the former sliding at 4000 mm and the latter at 5800 mm, with depths of 20 and 18 km respectively.