2017-06三峡库区M4.3、M4.1双地震强震记录分析

摘要

M4.3 and M4.1 double earthquakes occurred in Zigui and Badong counties of Hubei province in June 16 and June 18,2017.The Wuhan city circle earthquake early warning and intensity expedited reporting system demonstration project network successively obtained 13 and 11 strong motion records of the two events.We analyze the response spectrum and Fourier spectrum of the two earthquakes,and obtain the peak acceleration and instrumental intensity map.Results show that the maximum intensity of the instrument is 7.1 degrees,which is basically consistent with the intensity of the disaster assessment on the site of the epicentre of 7 degrees and 5 degrees in most areas.These results fully reflect the efficiency of Wuhan city circle earthquake early warning and intensity expedited reporting system demonstration project.%2017-06-16、06-18湖北省秭归县和巴东县先后发生M4.3、M4.1地震,武汉城市圈地震预警和烈度速报台网先后获取这2个事件13组和11组强震动记录.对2次地震进行反应谱和傅里叶谱分析,获取峰值加速度和仪器烈度图,得到仪器烈度值最大为7.1度,与震中现场灾害评估烈度7度、大部分地区5度基本一致,充分体现了武汉城市圈地震预警与烈度速报示范工程项目建设成效.