三分向数据震相的自动识别  

Automatic identification of three-component seismic phase

作　　者：李慧婷[1] 黄文辉[1] 

机构地区：[1]广东省地震局,广东广州510070

出　　处：《华南地震》2000年第4期46-53,共8页South China Journal of Seismology

摘　　要：利用三分向地震数据 ,提出了一种自动检测P波和S波初至的算法。此算法组合使用了短时窗检测器DSp 和长时窗DBp 检测器 ,具有短时窗的较高精度和长时窗较低的误触发率。应用广东、福建和云南省的地震数据进行测试 ,结果表明 :自动检测具有可靠的精度 ,地方震和近震P波到时误差小于 0 2s的超过 84 % ;S波到时误差小于 0 5s的超过 74 %。An algorithm has been developed for automatic picking P-and S-phase of three-component seismic data. The method has the feature of higher accuracy in short time window and lower false alarm rate in long time window because it has combined short time window detector (DB p) and long time window detector (DS p). It has been tested by seismograms of GDDSN, FJDSN and YNDSN, and the result shows that the arrival time can be picked automatically and accurately.More than 84% examples have an error of less than 2s for P-phase of local and near earthquake, and more than 74% examples have an error of less 0 5s for S-phase arrival time.

关 键 词：震相识别 地震波 三分向波形数据 极化性 P波 

分 类 号：P315.63[天文地球—地震学]