2021年云南漾濞M_(S)6.4地震仪器地震烈度与宏观地震烈度对比分析  

Comparative Analysis of the Instrumental Seismic Intensity and the Macro-seismic Intensity of the 2021 Yangbi, Yunnan M_(S)6.4 Earthquake

作　　者：明小娜[1] 崔建文[1] 杨健强[1] 于江[1] MING Xiaona;CUI Jianwen;YANG Jianqiang;YU Jiang(Yunnan Earthquake Agency,Kunming 650224,Yunnan,China)

机构地区：[1]云南省地震局,云南昆明650224

出　　处：《地震研究》2021年第3期422-428,共7页Journal of Seismological Research

基　　金：中国地震局地震工程与工程振动重点实验室重点专项(2020EEEVL0204)资助。

摘　　要：利用云南省强震动及地震预警台网获得的漾濞M_(S)6.4地震地震动记录数据,根据《中国地震烈度表》的仪器烈度计算方法,得到各台站的仪器地震烈度。对比分析了漾濞M_(S)6.4地震的仪器烈度图与宏观烈度图的异同,发现二者最高烈度相同、等震线长轴走向相似,但各烈度区面积与形状不相同;对比分析了仪器烈度与调查点的评估烈度的吻合性,发现二者完全吻合的比例为81.25%,偏差±1度的比例为93.75%,说明仪器地震烈度在一定程度上能客观反映实际的震害情况。According to the China Earthquake Intensity Table,we use the ground motion records of the Yangbi,Yunnan M_(S)6.4 earthquake on May 21,2021 obtained by strong-motion stations to calculate the instrumental seismic intensity.Then we compare the map of instrumental seismic intensity and the map of macro scopic seismic intensity of the Yangbi M_(S)6.4.We find that the two maps have the same highest intensity and the similar long axis of the isoseismal lines,but the area and shape of each intensity zone are different;the consistency of the instrumental intensity at the stations and the intensity on the corresponding survey sites is 81.25%,and the ratio of 1-degree deviation is 93.75%.It can be seen that the instrumental seismic intensity can objectively reflect the actual earthquake damage to some extent.

关 键 词：仪器地震烈度 宏观地震烈度 漾濞M_(S)6.4地震 地震动记录 

分 类 号：P315.91[天文地球—地震学]