The Scanning Characteristics of Spatial and Temporal Dynamic Pictures of the Seismicity in the South Yellow Sea and Its Coast Region

On the basis of the viewpoint of preparation of strong earthquakes in group, the spatial andtemporal scanning characteristics of the seismicity in the South Yellow Sea and its coast regionare studied, and some problems regarding the prediction of seismic hazard are also discussed.The results show that the seismic activity of M=4. 0 earthquakes has overall presented arelative stable state, but the partially concentrated area wbich evolves and migrates and theanomalous low b-value area have appeared in different periods, and the moderately strongearthquakes with M=5. 0～6. 0 have taken place on the edge of the anomalous area. Theaccumulative frequency of M=4. 0 earthquakes in the anomalous area presents non-linearindex acceleration and the moderately strong earthquakes have appeared in the late period ofthe non-linear index acceleration of M=4. 0 earthquakes or in the later anomalous tranquilperiotl. The spatial and temporal uneven Phenomenon of seismicity has some stability andreproducibility, and has

南黄海及沿岸地震活动时空动态扫描特征

从中强震成组孕育出发,研究了南黄海及沿岸地区地震活动时空动态图象扫描特征,探索了该区地震危险性预测的有关问题。结果表明,该区20多年来4级地震活动总体上呈相对平稳状态,但在不同时段则出现不断演变迁移的4级地震局部集中区及低b值区等异常区域,5～6级中强地震大都发生于异常区的边缘或附近;异常区内4级地震累积频度往往呈非线性指数加速,中强震发生于4级地震非线性指数加速的后期或其后的异常平静期中。这种地震活动时空非均匀现象具有一定的稳定性和重现性,对于中期至中短期地震危险性预测及缩小危险区范围具有一定的实用意义。

加勒比板块多学科研究综述及其对地震预测的启示

2010年1月12日海地M_W7.0地震打破了Enriquillo断层近240余年的地震平静期,可能意味着加勒比地区新的活跃周期的到来。本文通过收集该地区地质构造演化、地球物理场、发震构造、震源物理、运动学特征及应力场演化等方面的研究成果,分析由于海地地震的发生所带来的区域地震危险性等相关认识的改变。通过对多学科资料的梳理,分析利用多学科研究成果开展加勒比地区地震危险性分析的基本思路,以期为未来的中国大陆区域动力学模型构建、地震预测预报研究提供基础参考。