2003年8月16日内蒙古M_S5.9地震震害分布特征及其成因分析  

SPATIAL DAMAGE DISTRIBUTION OF AUGUST 16, 2003, INNER MONGOLIA, CHINA, M_S=5.9 EARTH QUAKE AND ANALYSIS

作　　者：高孟潭[1] 许力生[1] 郭文生[2] 万波[3] 俞言祥[1] 

机构地区：[1]中国地震局地球物理研究所,中国北京100081 [2]内蒙古自治区地震局,中国呼和浩特010051 [3]辽宁省地震局,中国沈阳110031

出　　处：《地震学报》2005年第2期205-212,共8页Acta Seismologica Sinica

基　　金：国家973项目(2002CB412706)资助.中国地震局地球物理研究所论著05AC1006.

摘　　要：总结了根据应急科考震害调查资料确定的2003 年8 月16 日内蒙古MS5.9 地震的震害分布特征, 利用中国数字地震台网(CDSN)的长周期波形资料, 反演确定了该地震的地震矩张量解和震源机制解. 根据震源机制解、余震分布和震害分布特征, 探讨了震害分布特点与震源机制的关系. 从全球强震记录、历史地震资料和该地震的震害特点, 讨论了强地面运动的特点与震中区物理背景的关系. 调查表明, 此次地震的极震区呈东西走向, 与震源机制反演结果得到的断层走向一致. 极震区面积相对较大, 单层土木结构和砖木结构的房屋受损较严重, 可能与当地的震源物理环境有一定关系.The spatial damage distribution of August 16, 2003, Inner Mongolia, China, M S=5.9 earthquake is summarized through field investigation. The moment tensor solution and focal mechanism are inverted using the digital long period waveform records of China Digital Seismograph Network (CDSN). The relation between the spatial damage distribution and focal mechanism is analyzed according to the focal mechanism, the aftershock distribution and the spatial damage distribution. The possible relation between the characteristics of ground motion and the tectonic background of the source region is discussed in terms of the global ground motion records, historical earthquake documents and the damage distribution. Investigation reveals that the meizoseismal region is in east west direction, which is consistent with the nodal plane of focal mechanism inversion. The meizoseismal area is relatively large and the damage of single story adobe houses or masonry houses is more severe. This may have relations with local seismotectonic environment.

关 键 词：内蒙古地震 震害分布 震源机制 震害成因 

分 类 号：P315.9[天文地球—地震学]