内蒙古中西部地区地震烈度衰减关系

Attenuation relation of seismic intensity in the middle and western regions of Inner Mongolia Autonomous Region

收集内蒙古中西部地区MS 4.5以上地震目录,筛选具有完整等震线的地震资料作为研究对象,由此选取该地区15次中强地震事件33条等震线数据,采用线性反演方法,对烈度衰减关系进行回归分析,获得适用于内蒙古中西部地区的地震烈度衰减模型,结合华北地区烈度衰减关系进行对比分析,结果表明,该衰减关系符合本地区历史地震灾害分布地域性特点,对于震后快速评估和地震应急具有重要意义。

Attenuation relation of seismic intensity is fitted by using 33 complete isoseismic datas from 15 earthquakes in the middle and western regions of Inner Mongolia Autonomous Region. All selected earthquakes from 1976 to 2015 were greater than MS 4.5. The fitted model for simulation of the actual value obtains by using linear inversion method. Comparisons are made between the models of North China and computed results. The result shows that the relation obtained well represents the features of historical and modem earthquake damage distribution in the areas, and is helpful a lot in fast aftershock assessment and earthquake emergency.