天津市及邻区地震烈度衰减关系研究  

Attenuation Relationship of Seismic Intensity in Tianjin City and Its Adjacent areas

作　　者：谷国梁[1] 邱虎[1] 王晓蕾[1] 李雅静[1] 赵颖[1] 张晖[1] 

机构地区：[1]天津市地震局,天津300201

出　　处：《震灾防御技术》2016年第1期35-43,共9页Technology for Earthquake Disaster Prevention

基　　金：天津市地震局局内科研项目(20131014);2014年地震应急青年重点任务(CEA-EDEM-201401)共同资助

摘　　要：本研究立足于地震应急领域,选用天津市及邻区34个震例的72条烈度等震线数据,利用最小二乘法拟合得到该地区的地震烈度衰减关系。依据椭圆模型的适用性,将震级上限定为6.5级。考虑到地震应急工作需求和邻区地震对天津辖区造成破坏的可能性,以及辖区内有感地震对社会生产、群众情绪产生的影响,研究将数据限定为天津市周边400km范围内的烈度外包线,震级下限为3.6级。通过与已有衰减关系对比,本研究结果对于5级以下地震应酌情降低烈度值,对于5级以上地震结果更合理。By using least square method, we achieve the attenuation relationship of seismic intensity in Tianjin city and its adjacent areas with 72 isoseismal lines from 34 earthquakes. According to applicability of the elliptical model, the upper limit of magnitude is 6.5. In the consideration of practical application in earthquake emergency management, the damage caused by the earthquake in adjacent areas and the social production and populace mood from felt earthquakes, the data range in this study distributes in a 400 km radius around Tianjin city, with the lower limit of magnitude of 3.6. In contrast to pre-existing attenuation relationships of seismic intensity, it proves that our result will reduce the intensity of earthquakes of magnitude 5 or lower and is more reasonable at the earthquakes of magnitude 5 or over.

关 键 词：地震应急 烈度衰减 天津市地区 

分 类 号：P315[天文地球—地震学]