地震地磁观测与研究Issue(3)：89-95,7.DOI:10.3969/j.issn.1003-3246.2014.03/04.014
sPn 震相特征及在震源深度测定中的应用
Characteristics of sPn phase and its application in focal depth determination
摘要
Abstract
With modeling theoretical seismograms,we studied the characteristics of sPn phase and analyzed the factors that may affect the phase.The result showed that the polarity of sPn with different azimuth angle may be different,and the depth location method based on the sPn phase is more suitable for M 4.0-6.0 earthquakes.Taking the Yiliang MS 5.6 ecent on September 7,2012 as an example,we obtained its focal depth is 9.6 km using the seismic waveforms recorded by the seismic array deployed in the southern section of the North-South seismic belt.The focal depth is determined from the arrival-time differences between sPn and Pn phase.The Pn waves are picked by the waveform cross-correlation method,and the sPn phases are identified by using the sliding-window correlation method.关键词
震源深度/深度震相/sPn震相/波形互相关/滑动时窗相关法/彝良地震Key words
focal depth/depth phase/sPn phase/waveform cross-correlation/sliding window cross-correlation/Yiliang earthquake引用本文复制引用
孙茁,吴建平,蔡妍..sPn 震相特征及在震源深度测定中的应用[J].地震地磁观测与研究,2014,(3):89-95,7.基金项目
地震行业科研专项（201308013）和国家科技支撑计划（2012BAK19B01）资助 （）
