摘要
通过几个典型震例,详细分析了震中距在145°至160°之间,核震相PKP的3个分支(PKPab、PKPbc、PKPdf)在数字化仪上的记录特征。指出中国地震台网在记录发生在南美洲的极远震时,能清楚地记录到PKP震相的3个分支,同时分析了这些震相在数字化地震仪上的记录特征,为今后台站人员在极远震震相的分析上作了一些有益的尝试。进而指出,分析PKP震相的3个分支,将有助于提高台站震相分析的精度,也将有助于整个中国地震台网的定位精度。
On the records of digital seismographs, the characteristics of three branches （PKPab, PKPbc, PKPdf） of the core phase PKP, with their epicenter in the range of 145°to 160°, were analyzed in details on basis of several examples. It is indicated that the three branches of the PKP phase could be well recorded by China seismic network when a far-teleseism occurred in South America. Their characteristics were also analyzed, providing some helpful attempts on analysis of far-teleseimic phases for people on seismic stations. It is indicated that the analysis of the three branches of PKP phase will be helpful to improve the accuracy of phase analysis and earthquake location of the entire China seismic network.
出处
《地震地磁观测与研究》
2006年第6期57-60,共4页
Seismological and Geomagnetic Observation and Research
基金
中国地震局三结合课题资助
