2021年云南漾濞MS6.4地震仪器地震烈度与宏观地震烈度对比分析
明小娜,崔建文,杨健强,于 江

(云南省地震局,云南 昆明 650224)

仪器地震烈度; 宏观地震烈度; 漾濞MS6.4地震; 地震动记录

Comparative Analysis of the Instrumental Seismic Intensity and the Macro-seismic Intensity of the 2021 Yangbi,Yunnan MS6.4 Earthquake
MING Xiaona,CUI Jianwen,YANG Jianqiang,YU Jiang

(Yunnan Earthquake Agency,Kunming 650224,Yunnan,China)

instrumental seismic intensity; macro-scopic seismic intensity; the Yangbi MS6.4 earthquake; ground motion records

备注

利用云南省强震动及地震预警台网获得的漾濞MS6.4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MS6.4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 MS6.4 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 MS6.4.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.