小泉沟地震台台基背景噪声特征分析OA
Analysis of background noise characteristics of Xiaoquangou Seismic Station
运用Welch算法计算小泉沟地震台功率谱密度PSD,得到垂直向 1/3 倍频程带宽 1-20 Hz各段的平均地动噪声RMS值为 2.88×10-9 m/s,小于 3.16×10-8 m/s,符合Ⅰ类台基标准.通过计算概率密度函数PDF,得到小泉沟地震台台背景噪声日变特征为,12-20 时明显增大,夜间明显降低,背景噪声受人为活动影响较大;背景噪声年变特征受气温、气压影响较大,呈现夏低冬高的变化趋势.
Welch algorithm is used to calculate the power spectral density(PSD)of Xiaoquangou Seismic Station.The RMS value of the average ground motion noise is 2.88×10-9 ms for each section of the 1-20 Hz frequency band in the vertical direction of 1/3 octave,it is less than 3.16×10-8 m/s,which accords to class I standard.According to the calculated probability density function(PDF),the background noise of the Xiaoquangou Seismic Station is characterized by a significant increase in the background noise during the period from 12 to 20 o'clock and a significant decrease in the background noise at night.The annual variation of background noise was influenced by temperature and pressure,and showed a trend of low in summer and high in winter.
段绍鑫;邓明文;张剑锋;张森
中国新疆维吾尔自治区 841000 新疆维吾尔自治区地震局库尔勒地震监测中心站中国新疆维吾尔自治区 841000 新疆维吾尔自治区地震局库尔勒地震监测中心站中国新疆维吾尔自治区 841000 新疆维吾尔自治区地震局库尔勒地震监测中心站中国新疆维吾尔自治区 841000 新疆维吾尔自治区地震局库尔勒地震监测中心站
小泉沟地震台背景噪声功率谱密度概率密度函数
Xiaoquangou Seismic Stationbackground noisepower spectrum densityprobability density function
《地震地磁观测与研究》 2024 (1)
35-39,5
评论