库尔勒VP型宽频带垂直摆倾斜仪背景噪声水平分析  

ANALYSIS OF BACKGROUND NOISE LEVEL OF KORLA VP VERTICAL PENDULUM TILTMETER

作　　者：杨绍富[1] 宋春燕[2] 苏萍[1] 张森 邓明文 YANG Shao-fu;SONG Chun-yan;SU Ping;ZHANG Sen;DENG Ming-wen(Korla Earthquake Monitoring Center Station of Earthquake Agency of Xinjiang Uygur Autonomous Region,Korla 841000,Xinjiang,china;Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830011,Xinjiang,China)

机构地区：[1]新疆维吾尔自治区地震局库尔勒地震监测中心站,新疆库尔勒841000 [2]新疆维吾尔自治区地震局,新疆乌鲁木齐830011

出　　处：《内陆地震》2024年第4期394-402,共9页Inland Earthquake

基　　金：新疆维吾尔自治区自然科学基金项目(2023D01A104)。

摘　　要：选取库尔勒台、若羌台、且末台3套VP型宽频带垂直摆倾斜仪观测数据,应用功率谱密度分析方法,分别计算在地震频段的地震噪声水平,并结合台站实际进行对比分析。结果表明:库尔勒台因洞室观测条件优异、洞室周边观测环境干扰小,仪器背景噪声水平较低。3套VP型宽频带垂直摆倾斜仪噪声水平在空间分布上未表现出明显的规律,但表现出NS分量记录优于EW分量的一致性。Observation data of three sets of VP broadband vertical pendulum tiltmeter at Korla sta-tion,Ruoqiang station and Qiemo station are selected,and the seismic noise level in the seismic fre-quency band is calculated by using the power spectral density analysis method.The results show that the background noise level of the instrument at Korla station is low due to the excellent observation conditions of the cavern and the small interference of the observation environment around the cavern.The noise level of the three sets of VP-type broadband vertical pendulum tiltmeter does not show ob-vious regularity in spatial distribution,but it shows the consistency that the NS component record is better than the EW component.

关 键 词：VP型宽频带垂直摆倾斜仪 功率谱密度 背景噪声 库尔勒 

分 类 号：P315.7[天文地球—地震学]