兰州测震台迁建选址及背景噪声分析

Site selection and background noise analysis of relocation of Lanzhou Seismic Station

随着城市化进程,兰州测震台观测环境受到诸多因素干扰,观测数据质量严重下降,需选址迁建,以适应新时期地震研究、防灾减灾新需求。经室内图纸作业,选择什川场点为新的台址,采用GL-PCS60一体化宽频带地震仪系统进行初勘和详勘工作,并计算分析地脉动速度均方根值(RMS)和噪声功率谱密度,结果表明,该台址观测环境较好,达国家Ⅰ类台建设标准。

With the advancement of urbanization,the observation environment of the Lanzhou Seismic Station has been subjected to numerous disruptions,resulting in a significant decline in the quality of observational data.To adapt to the new demands of earthquake research,disaster prevention,and mitigation in the new era,it is necessary to select a new location for relocation.Through indoor mapping and planning,the Shichuan site was chosen as the new location.The GL-PCS60 integrated broadband seismograph system was employed to conduct preliminary and detailed exploration work.Additionally,the root mean square(RMS)value of ground motion velocity and noise power spectral density were calculated and analyzed.The results indicate that the observation environment at this site is favorable,meeting the national standard for Class I seismic stations.