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Statistical regression analysis of empirical relationships of epicentral intensity,magnitude and focal depth
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【Author】 XU Weixiao;YANG Weisong;SUN Jingjiang;ZHANG Jigang;YU Dehu;School of Civil Engineering,Qingdao University of Technology;Collaborative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone;Key Laboratory of Earthquake Engineering and Engineering Vibralion,Institute of Engineering Mechanics,China Earthquake Administration;
【摘要】震中烈度是震源附近宏观破坏最为严重区域的地震烈度,快速判定其大小对指导抗震救灾具有重要意义。搜集整理了我国大陆地区1966-2014年期间的175次震级在5.0级以上的地震事件,回归得到了震中烈度与震级和震源深度的统计经验关系。与以前的研究结果相比,所选取的基础数据数量更大,而且均是近50 a来的地震事件,地震参数信息更为准确和统一。研究结果可用来快速判定震中烈度的大小。
【Abstract】Epicentral intensity is the intensity of the region located in the vicinity of seismic focus and with most serious macroscopic destruction. The rapid assessment of the epicentral intensity is of great significance for guiding earthquake relief work. 175 earthquakes( M≥5. 0) occurring in China from 1966 to 2014 were collected and sorted out,based on which,the statistical empirical relationship between epicentral intensity,magnitude and focal depth was obtained. Compared with the previous work,the basic data in this study have a larger number and the collected earthquakes all occurred in the last 50 years with more accurate and uniform parameter information. The results could be used for the rapid assessment of epicentral intensity.