流动测震台网在银川M4.8地震中的应用  

Application of Mobile Seismic Network in the M4.8 Earthquake in Yinchuan

作　　者：张慧 张文鑫 ZHANG Hui;ZHANG Wenxin(Yinchuan Seismic Monitoring Central Station,Earthquake Agency of Ningxia Hui Autonomous Region,Ningxia Yinchuan 750001,China)

机构地区：[1]宁夏回族自治区地震局、银川地震监测中心站,宁夏银川750001

出　　处：《防灾减灾学报》2025年第2期76-81,共6页Journal of Disaster Prevention And Reduction

摘　　要：2025年1月2日宁夏银川M4.8地震发生后,银川地震监测中心站迅速启动应急响应,开展流动测震台选址架设工作。通过对比分析余震序列数据发现,流动测震台站的加密布设有效提升了余震的监测能力,尤其对于M<1.5微小地震的波形记录,质量明显提升。此外,流动测震台网还有效降低了地震定位的水平误差、垂直误差,提高了定位精度。本研究通过银川M4.8地震震例验证了在中强震发生后,于震中区域架设流动地震台网加密观测的科学价值,为完善区域地震监测网络布局提供了重要的实践依据。After the M4.8 earthquake in Yinchuan,Ningxia on January 2,2025,the Yinchuan Earthquake Monitoring Center quickly activated emergency response and carried out site selection and installation work for mobile seismic stations.Through comparative analysis of aftershock sequence data,it was found that the encrypted deployment of mobile seismic stations effectively improved the monitoring capability of aftershocks,especially for waveform records of small earthquakes with M<1.5,the quality was significantly improved.In addition,the mobile seismic network has effectively improved and reduced the horizontal and vertical errors of earthquake positioning,and improved the positioning accuracy.This study verified the scientific value of setting up a mobile seismic network for encrypted observation in the epicenter area after a moderate strong earthquake through the M4.8 earthquake case in Yinchuan,providing important practical basis for improving the layout of regional earthquake monitoring network.

关 键 词：地震应急 流动台架设 噪声分析 地震序列 地震定位精度 

分 类 号：P315.6[天文地球—地震学]