福建仙游5.0级地震序列P波、S波拐角频率比值变化研究
South China Journal of Seismology(2015)
Abstract
利用福建仙游震区附近的3个数字地震台记录的仙游地震序列波形资料,采用PITSA软件,对2013年9月4日仙游ML 5.0地震发生前后73个前、余震的P波、S波拐角频率比值进行分析.结果表明:3个地震台的拐角频率比值在主震前均出现较明显的下降趋势,不同台站间主震前后的变化形态存在较明显差异.
MoreKey words
Xianyou ML5.0 earthquake,Earthquake sequence,Seismic wave spectrum,Corner frequency ratio
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