摘要
巴塘地震是两次6.7级和一次6.4和6.2级为主的震群型地震。地震过程中,跨断层短水准测量参加了现场监测,根据观测资料,从应力调整的角度提出了分析意见,对震情监测取得较好的效果。石棉5.2级地震前后的多期水准测量资料表明,震前多年未发现有断层活动,震后断层垂直活动明显,断层间相对位置以震后形成的格局为主,一年多来略有变化。
The Batang earthquake is a swarm—type of event,with a M=6.7 quake and a M=6. 4 quake being the main shocks.In the cause of earthquake,short—range levelling survey took part in the on— site monitoring.According to observational data,from the aspect of stress adjusment,the analyzed sug- gestions were made,which benefitted the monitoring of seismic regime.It was shown by the repeated levelling data before and after the Shimian M=5.2 earthquake that no fault movement was found many years before the quake while the vertical motion of fault was signifcant after the quake.The rel- ative locations of faults were governed by the framework formed after the earthquke with a little change for a year or more.
出处
《四川地震》
1991年第4期40-46,共7页
Earthquake Research in Sichuan
关键词
地震
观测
垂直
形变
断层
活动
short—range levelling survey across fault
vertical deformation
fault movement.
