Pdif震相的记录特征

摘要

通过对北京地震台1990-2008年间63个极远震记录的分析,简要讨论Pdif震相在CDSN 宽频带数字仪器上的记录特征.目前,北京地震台观测到的Pdif震相的记录范围约101.87°—172.18°,最小震级为6.0级,最浅震源深度为9 km,最深为631.3 km.所得结果有助于提高地震速报能力和积累震相分析经验,有助于核幔边界物理性质的认识.%In this paper,the recording character of Pdif phase of 63 far-teleseism observations recorded by broad band digital seismic instrument of CDSN Beijing Seismic Station during 1990 - 2008 is analyzed. At present, the Pdif phase was recorded among epicenter distance is 101. 87°-172. 8°. The minimum magnitude is about 6. 0. The minimum of earthquake source depth is about 9km, the maximum of earthquake source depth is about 631. 3 km. The result was very useful to enhance the earthquake analysis ability and accumulate analysis experience. It is very helpful to understand physics character about mantle-core border of the earth.