【摘要】 利用西昌流动地震台阵2013年1月至4月观测的垂直分量的地震连续波形数据,计算了各台站评价环境噪声的功率谱密度概率密度函数,对地震台站环境背景噪声特征进行了分析。计算结果表明,西昌流动地震台阵多数台站环境的噪声水平较低,平均噪声水平在0.01~10 Hz频段低于全球新高噪声模型(NHNM)的参考值,不同台站在0.1~1 Hz频段的噪声水平基本相同,更接近于全球新低噪声模型(NLNM)的参考值。当地震计架设在基岩上并采用密封措施后,可以有效防风和保温,并且降低了气压变化对地震计的干扰。更多还原

【Abstract】 The probability density function of the power spectrum density of each station is calculated by using the vertical component data of the vertical component of the Xichang mobile seismic array from April to January 2013.The results show that the noise level of Xichang mobile seismic array is relatively low at most stations. The average noise level at the band of 0. 01-10 Hz is lower than the global new high noise model( NHNM). The noise levels at different stations are similar at the band of 0. 1-1 Hz and close to the new low noise model( NLNM). When the seismometer is set up on the bedrock,the sealing measures can be used to effectively reduce the interference of the wind,temperature and air pressure change.更多还原