摘要
利用数字台网观测技术的优势,根据sPn与Pn震相到时差与震中距无关,以及振幅和周期都比Pn大的运动学和动力学特征,提出将震中距不同的台站的Pn震相对齐后同时测定多台的sPn震相,进而计算出该地震的震源深度。这种分析和测定方法简捷准确,可在台网的日常近震分析中推广应用。
In this paper, using the technological advantage of the digital seismic network and based on the kinematics and kinetics characteristics that the arrival time difference between sPn and Pn is independent of epicentral distance and the amplitude and period of sPn are larger than those of Pn, we presented a method for the simultaneous determination of sPn phase in multiple station with different epicentral distance by aligning the Pn arrivals. And then we can calculate the focal depth. This method of analysis and determination is simple and accurate, so it can be extend to the regional earthquake analyzing in the seismic network daily work.
出处
《地震地磁观测与研究》
2006年第3期77-80,共4页
Seismological and Geomagnetic Observation and Research
关键词
到时差
震中距
Pn震相对齐
震源深度
arrival time difference, epicentral distance, phase Pn alignment, focal depth
