地震初至震相自动识别方法研究

Research on Automatic Identification of P Phase

地震震相识别是地震记录分析的基础性工作,在地震定位、地下结构、以及地震学研究中有广泛应用。使用最常用的长短时窗能量比(STA/LTA)加自回归方法(AIC)的方式,采用两步法进行初至震相识别,并分析特征函数对能量变化的敏感度,该方法识别的初至震相70%以上都早0.5s以内,能够较好的识别初至震相。

Seismic phase identification is the basic work of seismic record analysis,it is widely used in seismic location, underground structure, and seismological research. This paper uses the most commonly used long-short window energy ratio(STA/LTA) and autoregressive method(AIC) method to identify the P phase using the two-step method, and analyzes the eigenfunction sensitivity to energy changes. More than70% of the P phase is within 0.5s, and it can better identify the first arrival phase.