基于 GPS观测数据 ,采用 DDA反演算法和位错正、反演算法 ,分别计算了地壳块体系统的形变和各块体边界 (断层带 )的错动以及边界附近的应变分布。与历史地震活动状况相比较 ,初步证明获得的地壳块体系统的运动和应变图像是可信的。总体来看 ,强震活跃区与高应变块体和强活动边界带有较明显的对应关系 ,这一特征有助于判定长中期地震大形势或背景 ;应变集中区及其邻近区域与强震区尽管不具有一一对应的关系 ,但多数强震确实发生在这些区域 ,即应变趋于集中并与邻区不断增大差异的区域有较大可能发生强震 ;也可以直接从速度场图像判定危险区 ,即速度发生显著变化的带或区域是可能的地震危险区"/>
On the basis of GPS observational data, dislocation on boundaries and strain inside blocks of a multi block system are computed with Discontinuous Deformation Analysis (DDA) and Dislocation Model (DM). It can be attested primarily that these patterns of motion and deformation of the block system, compared with historical seismicity, are believable. It can also be found that areas of strong seismicity are obviously corresponding to strong strain regions and intensively active boundaries, this correspondenc..."/>
RESEARCHES ON CURRENT CRUST MOVEMENTS AND EARTHQUAKE PRECURSORS
Abstract On the basis of GPS observational data, dislocation on boundaries and strain inside blocks of a multi block system are computed with Discontinuous Deformation Analysis (DDA) and Dislocation Model (DM). It can be attested primarily that these patterns of motion and deformation of the block system, compared with historical seismicity, are believable. It can also be found that areas of strong seismicity are obviously corresponding to strong strain regions and intensively active boundaries, this correspondenc...
