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为了从地壳运动角度利用重复大地测量数据分析大陆强震机理 ,提出了利用反映地壳内部密度变化或时变的物理量来分析强震发生的密度变化机理的一种物理方法 :(1)介绍了地球内部密度时变的一般理论和单层密度时变理论 ,提出了分步迭代算法 ;(2 )简要分析了断层位错引起的单层密度变化效应 ;(3)分析了 1996年丽江 7级地震前震区南部地壳密度时变 (变化 )的特征 ;(4 )初步探讨了强震孕育过程中可能的地壳内部密度时变 (变化 )前兆模式或发震机制。
In order to analyze the mechanism of strong earthquakes in the continent by using repeated geodetic data from crustal movement, a physical method is proposed to analyze the density change mechanism of strong earthquakes by using physical quantities that reflect the density change or time-varying in the crust: (1) (2) a simple analysis of the single-layer density change effect caused by fault dislocation; (3) the analysis of the 1996 Lijiang M7 earthquake (4) The probable time-varying (changing) precursory pattern or seismogenic mechanism of the interior crust may be preliminarily discussed.