摘要
本文改进了两种震相识别方法。用最大特征值法可识别快、慢剪切波到时,用波形识别算子法可确定快剪切波的到时及其序列。将两种方法结合起来,可比较和鉴别地震波的到时及其类型,从而可以避免将转换P波误认为快剪切波,达到最终确定剪切波到时及其序列的目的。以1985年禄劝Ms6.1地震为例,用上述方法进行了剪切波分裂的研究,结果与张性扩容各向异性假说是一致的。
This paper, raises two methcds of distinguishing the seismic phase. By the greatest eigenvalue method,the arrival time of fast and.slow shear-wave and convert P wave may be determined. By the method of wave distinguishing factor,fast shear-wave arrival time and wave sequence may be determined. Combining these two methods, the possbility of taking the conversion P wave as fast shear-wave may be removed. By using the above-mentioned methods to 1983 Luquan Ms6.1 earthquake, the results show that the fast shear-wave polarization direction is in keeping with what EDA hypothesis raised.
出处
《西北地震学报》
CSCD
1992年第4期17-24,共8页
Northwestern Seismological Journal
