| 地震波形群体特征在强余震预测中的应用 |
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| 引用本文： | 陈宇卫,刘文龙.地震波形群体特征在强余震预测中的应用[J].地震地磁观测与研究,1995,16(4):43-47. |
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| 作者姓名： | 陈宇卫 刘文龙 |
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| 作者单位： | 安徽省地震局 |
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| 摘 要： | 研究了华东地区１５个地震序列的振幅比、初动方向和初动半周期资料。得到：大震（主余型序列中的主震或震群型序列中最大地震）前后的Ｐ波初动方向，除人们熟知的由优势分布转化为紊乱外，还有可能呈优势分布，优势方向改变的特征。余震序列的Ｐ波初动方向和振幅比特征可能有助于预测强余震。初动半周期特征可能用于区别的前震和余震。
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| 关 键 词： | 地震序列 振幅比 地震波形 群体特征 余震预测 |
Application of group characteristics of recorded seismograms to prediction of strong aftershocks |
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| Chen Yuwei, Liu Wenlong,Wu Peizhi.Application of group characteristics of recorded seismograms to prediction of strong aftershocks[J].Seismological and Geomagnetic Observation and Research,1995,16(4):43-47. |
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| Authors: | Chen Yuwei Liu Wenlong Wu Peizhi |
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| Abstract: | In this paper the amplitude ratio of P to S waves,the direction and half-period of the first motion fifteen earthquake sequences in eastern China have been studied. The results obtained show: Besides the well-known case in which the distribution of first P motion changes from predominant distribution to random distribution after the main shock,it is possible that the first motion of P wave still shows the predominant distribution feature after the main shock.but with predominant direction changed.It is pointed out that the features of the first motion direction and the amplitude ratio of P to S waves in aftershock sequences are possibly helpful in forecasting major aftershocks,and that the features of the half-period of first motion are useful in distinguishing between the foreshocks and the aftershocks. |
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| Keywords: | seismic sequence amplitude ratio seismic wave form |
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