摘要
以震源机制解资料推演并分析了渤海海峡及其周围地区现代构造应力场的总体特征、分区差异及地震破裂性质。认为构造应力场在某些局部与大区域之间有一定差异，而主张应力轴方位参数一致性稍好些，约在３３０°～３６０°之间，取向为北北西；构造应力场存在分区差异，尤以南北纵向差异明显；由于研究区内包含了地质构造和新构造活动性质各异的多个构造单元。
The general features and zoning difference of recent tectonic stress field in Pohai Straits and its vicinity and its seismic rupture character are deduced and analyzed from the data of the focal mechanism solution in this area.It is found that the tectonic stress field in the whole area is different from that in some parts,but the azimuths of their principal extensional stress axes are relatively consistent,about 330°～360°,in NNW direction.In addition,tectonic stress field is different in different zones,and especially in SN direction.Because the research area covers a lot of tectonic units with various geological structures and neotectonic activities,seismic ruptures aren't along a uniformed orientation.
出处
《内陆地震》
1999年第1期7-16,共10页
Inland Earthquake
关键词
震源机制解
渤海海峡
华北北部
地震
Focal mechanism solution\ Pohai straits\ North of North China
