西北黄土地区及其邻区烈度影响范围的模糊信息分析

FUZZY SETS METHOD ON EVALUATING ISOSEISMAL MAP OF LOESS AREA IN NORTHWEST CHINA

摘要:

本文以西北黄土地区(陕、甘、宁、青)及其邻区历史地震等震线资料为基础,采用模糊信息分析方法,建立震级与烈度分布范围的模糊关系,并将其用于甘肃境内近年发生的迭部地震和景泰地震,计算结果与实际震害情况较为接近。本文还将研究结果同前人的工作进行了对比。

Abstract:

Based on the historical earthquake data of the loess are in Northwest China and by using the fuzzy sets method,the fuzzy information relation between magnitude and isoseismal area in the loess area is established.According to the fuzzy relation,two recent earthquakes' isoseismal areas are examined,and the results are more corresponding to the reality than that using the least squares method. Finally,the results are compared with the former's.