灵武4.0级地震仪器烈度与宏观烈度的对比分析  

Comparative Analysis of the Instrumental Seismic Intensity and the Macro-seismic Intensity of the 2021 Lingwu 4.0 Earthquake

作　　者：唐浩 李世忠[1] 李青梅[1] 何秋菊[1] TANG Hao;LI Shizhong;LI Qingmei;HE Qiuju(Earthquake Agency of Ningxia Hui Autonomous Region,Yinchuan 750001,China)

机构地区：[1]宁夏回族自治区地震局,宁夏银川750001

出　　处：《宁夏工程技术》2023年第2期122-127,共6页Ningxia Engineering Technology

基　　金：宁夏自然科学基金项目(2022AAC03689)。

摘　　要：依托国家地震烈度速报与预警工程子项目,宁夏共建设一般站270个。2021年宁夏灵武4.0级地震发生后,有90多个一般站的烈度仪记录到了此次地震。根据《中国地震烈度表》仪器烈度计算方法,计算了各一般站记录到的仪器地震烈度,并且对此次地震的仪器烈度和宏观烈度进行了对比分析。结果表明:仪器烈度和宏观烈度的最高烈度均为Ⅴ度,仪器烈度Ⅴ度区比宏观烈度Ⅴ度区的范围大,并且前者能够很好地包围后者;大部分的仪器烈度与调查点宏观烈度有较好的吻合度,但也有个别站点的仪器烈度存在偏差。由此可见,在宁夏区域一般站烈度仪的仪器烈度能够较为客观、准确地反映实际震害情况。A total of 270 general stations were built in Ningxia based on the sub-project of National Earthquake Intensity Rapid Response and Early Warning Project.After the Lingwu 4.0 earthquake,more than 90 general stations with intensity meters recorded the earthquake.According to the instrumental seismic intensity calculation method of the China Earthquake Intensity Table,the instrumental seismic intensities recorded at each general station were calculated,and the instrumental intensity and macroscopic intensity of this earthquake were compared and analyzed.The results show that the maximum of both instrumental and macroscopic intensities is V.The instrumental intensity V zone is larger than the macroscopic intensity V zone,and the former can well enclose the latter.Most of the instrumental intensities are in good agreement with the macroscopic intensities of the survey sites,yet there are still deviations in some stations.It verifies that the instrumental seismic intensity of general stations’intensity meters in Ningxia can reflect the actual earthquake damage situation objectively and accurately.

关 键 词：灵武4.0级地震 仪器烈度 宏观烈度 

分 类 号：P315.63[天文地球—地震学]