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根据前人和作者最新深部地球物理探测研究成果，完成了中国东部大陆（１０５°Ｅ以东）１°×１°壳－幔结构比值Ｒ（Ｒ＝Ｃ／Ｌ，Ｃ为地壳厚度，Ｌ为岩石层厚度）分布图的编绘．研究了Ｒ值分布与东部大陆岩石层分块、大地构造形态特征；Ｒ值分布与东部大陆地震活动的非均匀性特征；Ｒ值分布的动力学内涵．结果表明：１．Ｒ值等值线特征反映了岩石层块体划分、大地构造形态，Ｒ值特征与岩石层块体划分、大地构造形态有其深部成因上的联系；２．高Ｒ值区对应地震高活动区，因而Ｒ值可作为地震区划、地震危险性评定的定量指标，Ｒ值是地震活动的动力因子．
According to the latest deep geophysical exploration results of predecessors and authors, the crust-mantle structure ratio R (R = C / L, 1 ° × 1 °) of the eastern mainland China (east of 105 ° E) Rock thickness) plot of the distribution. The distribution of R value and the lithospheric block and tectonic features of the eastern continental are studied. The distribution of R value and the nonuniformity of the seismic activity in the eastern part of the continent are also discussed. The dynamic connotation of the R value distribution is also studied. The result shows: 1. The R value isoline maps reflect the division of lithofacies, the tectonic setting, the relationship between the R value and the division of lithostratigraphic blocks, and the deep tectonic connection of the tectonic settings.2. The high R value area corresponds to the high active area of earthquake, so R value can be used as a quantitative index for seismic zoning and seismic risk assessment. R value is the dynamic factor of seismic activity.