云南孟连地震台Pdiff震相震中距范围探讨

Discussion on the range of epicentral distance of Pdiff phase at Menglian Seismic Station

采用2014年3月至2022年12月孟连地震台测震资料,对震中距为90°—175°的远震进行分析。分析结果表明,Pdiff震相在孟连地震台出现的震中距范围为92°—172°,计算得到的Pdiff震相走时函数与理论值基本吻合,表明其一致性较好。

Based on the seismic data of Menglian Seismic Station from March 2014 to December 2022,the teleseismic events with epicentral distance from 90°to 175°are analyzed.The results show that the epicentral distance range of Pdiff phase at Menglian Seismic Station is from 92°to 172°,and the travel time function of Pdiff phase is basically consistent with the theoretical value.