西南地区近代地震的震中烈度与有感半径的统计研究

The Statistical Study on Near-epicenter Intensity and Sensible Radius of Recent Earthquakes in Southwest China

本文对中国西南地区的近代破坏性地震资料进行了较为系统、全面的清理,按地震构造环境和震害特点进行了地震区域分区;全面收集不同区域内既有仪器测定震级,又有宏观烈度调查资料的地震;分别统计得到西南地区和四川盆地地区震中烈度与震级、有感半径与震级之间的关系;并与几个已有统计关系进行了对比。本文统计结果可应用于地震安全性评价、震害预测与快速评估的工程实践中。

Based on the tectonic background and seismic hazard distribution of the recent destructive earthquakes in Southwest China, we classified the study area into different units. Then the statistical analysis is performed in determining the relationship between near-epicenter intensity and magnitude, as well as the relationship between sensible radius and magnitude. The comparison with some preexisting relationships from the previous studies suggests that our new results will be useful for seismic safety evaluation, earthquake damage prediction and fast disaster assessment.