【摘要】 通过3个台站地脉动频谱特征的对比,发现德令哈地震台地脉动记录6.5—7.5 Hz频段存在明显的高频干扰。根据2008年1月至2010年10月以来该高频干扰的频谱演化规律,对其产生背景来源做初步分析,在一定程度上解释了德令哈地震台P波记录个数减少的原因。更多还原

【Abstract】 Broadband seismometer is so sensitive that a slight variation of the environment for seis-mological observation can influence the quality of digital records. First, by contrasting the frequency spectrum characteristics of microseisms records among three stations, it is discovered that there was high-frequency interference at the band of 6. 5—7. 5 Hz on the digital records of Delingha Seismic Station. Based on the evolution pattern of spectrum range from 6. 5 to 7. 5 Hz, original background and sources were preliminarily analyzed, which may account for the decreases of P wave records in Delingha Seismic Station to certain degree.更多还原