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我国位于太平洋板块和印度洋板块之间的欧亚板块东南部。它不仅是西太平洋地震系和地中海-喜马拉雅地震系的汇合地区,而且也是世界板块内部地震活动最强的地区之一。境内地震活动分布广泛,具有明显的分区特征。依据地震活动、地质构造、地球物理场和构造应力场等特征,将我国划分为10个地震区(图1),地震区內还分出了地震亚区和地震带。
My country is located in the southeast of the Eurasian Plate between the Pacific and Indian Oceans. It is not only a convergence area of the Western Pacific Seismological System and the Mediterranean-Himalayan Seismological System, but also one of the areas with the highest seismic activity within the world plate. The seismic activities are widely distributed in the territory and have obvious zoning characteristics. According to the characteristics of seismic activity, geological structure, geophysical field and tectonic stress field, China is divided into 10 seismic regions (Fig. 1), and the seismic sub-region and seismic belt are also separated in the seismic region.