北京地震台远震Pn、PnPn波分析

英文篇名：The analysis of phase Pn and PnPn that recored in tele-earthquake on Beijing Seismic Station
中文刊名：地震地磁观测与研究
英文刊名：Seismological and Geomagnetic Observation and Research
作者：朱战斌
英文作者：Zhu Zhanbin (Beijing Seismic Station ; Beijing 100095 ; China)
中文关键词：远震 ; Pn波 ; PnPn波 ; 北京台走时表
英文关键词：tele-earthquake ; phase Pn ; phase PnPn ; BJT travel time table
出版日期：2012-10-25
机构：北京国家地球观象台;
年：2012
期：Z2
出版单位：地震地磁观测与研究

摘要

在北京地震台NCDSN宽频带地震图集编辑工作中,发现Pn波在远至震中距16.8°的地震中仍然作为初至波被清晰记录,而PnPn波则延续至震中距30°左右仍以非常明显的震相特征被记录下来。
During the work of making the typical seismic atlas of the broadband seismic record of NCDSN Beijing Seismic Station,we found the first arrival phase that recorded in the far distance of epicenter 16.8°earthquake was still the Pn,and the phase PnPn as the obvious characteristic semismic phase was recored continuously to the distance of epicenter about 30°.In this paper,it tries to show and prove the characteristics and the existence evidences of the teleseismic Pn and PnPn,and also tries to explain the reasons of the PnPn amplitude is much larger than the Pn amplitude several times.

引文

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