上海地震台阵地动噪声功率谱分析

介绍了功率谱分析的计算方法，并将功率谱应用于对上海地震台阵地动噪声记录的分析。结果表明，该台阵16个子台的地动噪声功率谱在高于1Hz的频域上均低于宽频带台站的平均值，说明各子台的背景噪声符合并优于地震观测对背景噪声的要求。而对于高频段的噪声则可通过台阵的独特的数据处理，很容易将其去除。

Power spectrum analysis of ground motion noise in Shanghai Seismic Array

In this paper,the calculating method of power spectrum analysis is introduced.And the power spectrum analysis is applied to the noise records of ground motion in Shanghai Seismic Array.It is concluded that,within the frequency band higher than 1 Hz,the power spectra of ground motion noises at 16 substations are all lower than the average value of those at broadband stations,showing that the background noise at each substation is consistent with and excels the standard about background noise for earthquake observation.And the noise within the high frequency band can be eliminated easily by the unique data processing for seismic array.