强震预警中P波到时STA/LTA和贝叶斯BIC双步骤捡拾研究*

(1.云南省地震局,云南 昆明 650224; 2.昆明学院 城乡建设与工程管理学院,云南 昆明 650214; 3.中国地震局地球物理研究所,北京100081)

地震预警; P波; 强震记录; STA/LTA; 贝叶斯准则; 双步骤捡拾

Research on Double-steps Pickup of STA/LTA and Bayes BIC Rule Applied to Travel Time of P-wave in Strong Earthquake Early Warning
YANG Liwei1,QIU Zhigang2,LIN Guolinag1,WANG Yushi3

(1. Yunnan Earthquake Agency,Kunming 650224,Yunnan,China)(2. School of Urban and Rural Construction & Engineering Management,Kunming University,Kunming 650214,Yunnan,China)(3. Institute of Geophysics,China Earthquake Administration,Beijing 100081,China)

earthquake early warning; P-wave; strong earthquake records; STA/LTA; BIC rule; double-steps to pick up

备注

以云南地区的地震数据为基础,借鉴国内外P波震相自动识别相关研究,提出一套可实时处理P波震相的方法,即STA/LTA和贝叶斯BIC双步骤捡拾法。应用此方法对所选取的云南强震动台网观测记录进行P波自动精确识别,并与人工捡拾方法结果进行对比,确定STA/LTA和贝叶斯BIC双步骤捡拾法的识别精度能满足地震预警快速准确的要求。

Used the domestic and overseas researches of P wave seismic phase identification for reference,a real-time processing method for P wave seismic phase identification is proposed based on seismic data of Yunnan area. The method is STA/LTA+BIC two-step pick-up method,by which the selected records of P wave from Yunnan Strong Motion Observation Network were accurately and automatically identified. The differences between this method and the artificial pick-up method were compared and analyzed. The results shows that the precision of STA/LTA+BIC two-step pick-up method can meet the rapid accurate earthquake warning requirement.