地震动等值线生成方法研究

目前借助分布广泛的地震监测台网,在震后几分钟内获知地震的位置及震级已不再成为问题。受到经济条件以及地理条件等因素的制约,我国的地震监测台网数量还很少,其分布也不够广泛,尤其是实时数据传输的强震动观测台网的规模与密度还十分有限。因此在一次地震发生后,获得的地震数据记录有限。利用这些有限的记录,提出了几种不同情况下的地震动等值线生成方法,通过统计分析、插值等数学方法快速确定地震发生后该地区范围内地震动影响范围及其衰减规律,即确定地震后现场的加速度分布区域,其结果将对地震应急反应具有重要的指导意义。

Study on the generation of isolines of earthquake ground motion

At present,it is possible to determine the location and magnitude of the earthquake within several minutes after the earthquake occurred by the widely distributed earthquake surveillance networks.However,on restriction of the financial resources and geographical conditions,there are few surveillance networks in China and especially the dimension and density of the real-time data transmission networks are very limited.Therefore,there are limited earthquake records obtained after an earthquake.In this paper,the auto-generation methods of the strong ground motion isoline under different conditions are proposed.Using the limited earthquake records,the influence range of the ground motion and its attenuation law are quickly determined after the earthquake by the mathematic methods,such as the statistic analysis,the interpolation method and so on,which determine the acceleration distribution area of the site after the earthquake.The results will make a great guided significance for the earthquake preparedness and emergency response.