对P波衍射波Pdif震相记录范围的讨论
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摘要
通过１６年（１９８０－１９９５年）中国地震台网对极远震记录资料分析后的结论是：Ｐ波衍射波Ｐｄｉｆ在中国台网的记录上震中距范围可达到１００°－１５８°附近，最低震级可在５．６级；佘山台的记录范围比全国台网窄些，而且对地区的灵敏度较大。结论说明我国地震台网对Ｐｄｉｆ震相的记录范围比理论值广，亦对台站速报和台站测震分析起一定作用。
This paper analysed the data of very teleseisms recorded in Chinese seismic stations during the last 16 years(1980-1995)and came to the conclusion that the recorded distance for the diffraction wave Pdif of wave P is. about 100°-158°. The recorded least magnitude b 5. 6. In the Seismic Station of Shanghai , the recorded region is narrow , but it is very sensitive to re- gion. The conclusion is that the recorded distance of Pdif in Chinese seismic stations would be larger than that of theory. This result is very usefull for earthquake analysis.
This paper analysed the data of very teleseisms recorded in Chinese seismic stations during the last 16 years(1980-1995)and came to the conclusion that the recorded distance for the diffraction wave Pdif of wave P is. about 100°-158°. The recorded least magnitude b 5. 6. In the Seismic Station of Shanghai , the recorded region is narrow , but it is very sensitive to re- gion. The conclusion is that the recorded distance of Pdif in Chinese seismic stations would be larger than that of theory. This result is very usefull for earthquake analysis.
引文
陈培善。1991测震分讲座。地震地磁观测与研究，12（6）：29－30国家地震局地球物理研究所编。1980－1991年。中国地震台网观测报告，北京：地震出版社国家地震局地球物理研究所用。1992－1995年。中国地震台临时报告。北京：地震出版社PDE＝PreliminaryDeterminationofEpicentersUSDepartmentoftheinterior／GeologicalSurveyNationalEarthquakeIn－formationCenter。1980－1995年
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