由同震形变理论计算地震烈度分布的讨论  

Discussion on the Seismic Intensity Distribution Calculated by Co-seismic Deformation Theory

作　　者：张晁军[1] 李卫东[1] 李大辉[1] 林捷[1] 侯燕燕[1] 张爱武[1] 陈会忠[2] 

机构地区：[1]中国地震台网中心,北京100045 [2]中国地震局地震预测研究所,北京100036

出　　处：《地震》2011年第1期98-106,102-106,共9页Earthquake

基　　金：汶川地震发生机理及其大区动力环境研究(2008CB425705);基于IPV6技术的地震观测系统(CNGI-09-01-08)

摘　　要：本文以海地7.3级地震和汶川8.0级地震为例,介绍了同震位移烈度方法,即在已知地震三要素、断层走向、倾向和滑动方向的情况下,可通过计算绝对同震位移来确定地震烈度分布。研究表明,由绝对同震位移计算的地震烈度分布与实际地震烈度有很好的一致性,特别是在极震区其对应效果更好。尽管这种计算结果有时与实际情况有一定出入,但这对震后快速做出灾害评估和制定救灾策略有重要作用。特别是在强地震发生的地区由于台站稀疏和大地震短时间资料数据不能及时获取的情况下,本方法更具有一定的优势。In this paper,we introduce the method by using co-seismic displacement to calculate seismic intensity as applied to Haiti M7.3 earthquake and Wenchuan M8.0 earthquake examples.Under the condition of knowing the three elements of earthquake,fault strike,dip and slip direction,we could determine the distribution of seismic intensity by calculating the absolute co-seismic displacement.This study shows that intensity distribution map calculated by the absolute co-seismic displacement is in good agreement with the actual seismic intensity map,especially in the highly seismic area the results corresponds better.While such calculations are sometimes combined with a certain access to the actual situation,it would play an important role in rapid disaster assessment and relief dicision-making after earthquakes.In particular,this method has a more unique advantage in the region where strong seismic stations are sparse and in the case of not getting timely information and data shortly after a large earthquake.

关 键 词：地震三要素 断层参数 同震形变 绝对同震位移 地震烈度 

分 类 号：P315.7[天文地球—地震学]