下扬子地区与西太平洋俯冲带地震相关性研究及动力学背景探讨

The Earthquake Correlation between The Lower Yangtze Region and The Western Pacific Subduction Zone and Its Dynamic setting

对下扬子地区与琉球岛弧、日本岛弧、喜马拉雅碰撞带的地震活动性特征和不同区块之间地震活动的相关性进行分析．并结合地质构造、岩石圈结构、运动学特征等探讨了下扬子地区中强震发生的动力学背景。研究结果表明：下扬子地块与琉球岛弧带应变释放过程趋势一致；下扬子地区中强震与琉球岛弧带强震相关性较好：受琉球岛弧带发生强震影响，在6-8年时间范围内下扬子地区发生中强震概率较高：从更长远时间来看。下扬子地区中强震和构造应变主要受西太平洋板缘俯冲构造运动影响。

This article analyzed the seismic activity feature of the Lower Yangtze region and Ryukyu island arc, Japan island arc, the Himalayan collision zone and the correlation of seismic activities between different blocks, and discussed the dynamic setting combining the geological structure, lithosphere structure and dynamic feature. The results indicates that the Lower Yangtze region and Ryukyu island have the same trend of strain release process, and have better correlation in the strong earthquake; affected by the strong earthquakes occurred in Ryukyu island arc, in 6-8 years time range the Lower Yangtze region has the higher probability of occurrence of the moderate earthquakes; for more long-term time , the strong earthquakes and tectonic strain are mainly affected by subduction of tectonic movement of the Western Pacific Plate.