川滇地区地震(M_S≥5.0)破裂类型与前兆异常分布的关系  

RELATION OF EARTHQUAKE (M_S≥5.0) RUPTURE TYPES AND PRECURSOR ANOMALY DISTRIBUTION IN SICHUAN AND YUNNAN

作　　者：张永久[1] 朱航[2] 李桂芳[2] 吴小平[2] 

机构地区：[1]中国科学技术大学空间与地球科学系,安徽合肥230026 [2]四川省地震局,四川成都610041

出　　处：《内陆地震》2002年第2期136-142,共7页Inland Earthquake

基　　金：中国地震局"十五"科研项目 (0 1- 0 2 )

摘　　要：对川滇地区 31次 (组 ) 5 .0级以上地震与余震次数的关系进行了统计 ,结合“强地震分为走滑型地震和断错型地震”的理论 ,确定了各次 (组 )地震的破裂类型。从物理机制上对地震破裂类型与震前前兆异常分布关系进行了讨论 ,由此进一步探讨了 5 .By statistically analyzing the relation between 31 (groups of) earthquakes(M\-S≥ 5.0 ) in Sichuan Yunnan region and the numbers of the aftershocks, the rupture type of every group of earthquakes was determined according to the theory 'a strong earthquake belongs to strike slip type or rupture type'. The relation of earthquake rupture types and precursor anomaly distribution was discussed from the angle of physical mechanism. It is believed that the discussion will be helpful to the post earthquake trend judgment of M\-S≥5.0 earthquakes.

关 键 词：地震破裂类型 余震 地震预报 川滇地区 地震前兆异常 

分 类 号：P315.72[天文地球—地震学]