首页|期刊导航|中国地震研究(英文版)|Recent Crustal Stress Field and Dislocation Along Seismic Faults in the East China Region
中国地震研究(英文版)2005，Vol.19Issue(4)：442-457,16.
Recent Crustal Stress Field and Dislocation Along Seismic Faults in the East China Region
Recent Crustal Stress Field and Dislocation Along Seismic Faults in the East China Region
摘要
Abstract
A statistic analysis of the characteristics of recent tectonic stress fields in the East China region was performedusing 143 sets of data of single focal mechanical solutions of moderate and small earthquakes and 17 sets of data of composite focal mechanism solutions. The result shows that at present the East China region is controlled by an ENE-( about 80°) oriented principal compressive and NNW-(about 350°) oriented principal tensile stress field. The effect mode of the principal stress is mainly horizontal and sub-horizontal. In a background of basic consistency of the direction and effect mode of stress field, the existence of different seismotectonic zones may be related to the distribution of major active faults in the relevant areas. It indicates the effect and control of the existing structures on the seismic dislocation.Analysis of focal mechanism solution data of recent moderate and small earthquakes and directions of long axes of isoseismal contours of historic moderate and strong earthquakes and recent felt earthquakes indicates that seismic rupture and dislocation in East China region occurred mainly along the faults in NE and NW directions, and sometimes in NNE, ENE,WNW or near-WE directions. Movement along the seismic faults is mainly strike-slip or nearstrike-slip, with a less oblique slip component. Regional difference in dislocation modes exist along the seismic faults. The historical moderate and strong earthquakes in East China produced mainly NE-trending ruptures and dislocations, while the recent earthquakes produced NW-SE ruptures and dislocations in the land region and NE and NW ones in the sea areas.关键词
Focal mechanism solution/Crustal stress field/Seismic fault/Dislocation/East China regionKey words
Focal mechanism solution/Crustal stress field/Seismic fault/Dislocation/East China region分类
天文与地球科学引用本文复制引用
Zhou Cuiying,Wang Zhengzheng ,Jiang Haikun,Li Yonghong,Wu Yanhe..Recent Crustal Stress Field and Dislocation Along Seismic Faults in the East China Region[J].中国地震研究(英文版),2005,19(4):442-457,16.基金项目
The research was supported under a project of the State Key Science and Technology Program (2001BA601B10401), China. （2001BA601B10401）
