并对速度横向不均匀性及其与地质构造、地震活动的关系进行了探讨。
Then the relationship between the lateral velocity heterogeneity and geological structures and seismicity is discussed.
云南地区S波速度结构具有很强的横向不均匀性。
In Yunnan region, s wave velocity structures show strong horizontal heterogeneity.
层面成象的结果表明：1。华北地区的地震波速度存在明显的横向不均匀性。
The results of tomography demonstrate that 1. there is significant lateral inhomogeneity in wave velocity in the North China region;
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