| 山西洪洞ML5.0地震前后地震波参数的异常特征 |
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| 引用本文： | 李媛媛,贾建喜,程紫燕,吴东.山西洪洞ML5.0地震前后地震波参数的异常特征[J].山西地震,2007(1):1-6,19. |
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| 作者姓名： | 李媛媛 贾建喜 程紫燕 吴东 |
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| 作者单位： | 山西省地震局,山西,太原,030021 |
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| 摘 要： | 采用山西数字遥测地震台网的数字化地震波形资料,研究了山西洪洞地震前后P波初动符号、初动半周期、振幅比、S波衰减率、尾波持续时间比等地震波参数的异常特征,得出了地震前,小震P波初动符号一致性增强,初动半周期存在低值—波动—发震或低值—发震的时序演化过程等结论。
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| 关 键 词： | 地震波 异常特征 洪洞地震 |
| 文章编号： | 1000-6265（2007）01-0001-06 |
| 收稿时间： | 2006-11-15 |
| 修稿时间： | 2006-11-152006-11-18 |
Anomaly Characteristics of Seismic Wave Parameters before and after the Hongtong, Shanxi, Earthquake of ML5.0 |
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| LI Yuan-yuan,JIA Jian-xi,CHENG Zi-yan,WU Dong.Anomaly Characteristics of Seismic Wave Parameters before and after the Hongtong, Shanxi, Earthquake of ML5.0[J].Earthquake Research in Shanxi,2007(1):1-6,19. |
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| Authors: | LI Yuan-yuan JIA Jian-xi CHENG Zi-yan WU Dong |
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| Institution: | Earthquake Administration of Shanxi Province, Shanxi, Taiyuan 030021 ,China |
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| Abstract: | Based on the digital seismic waveform data of the Shanxi Digital Telemetric Seismograph Network,anomaly characteristics of seismic wave parameters,including sign and half-period of first motion of P wave,amplitude ratio,attenuation rate of S wave and duration time ratio of coda wave,before and after the Hongtong,Shanxi,earthquake are studied.It is concluded that consistency of the signs of first motion of P wave for small earthquakes increases,and that half-period of first motion has the time sequence evolvement process of low value-fluctuation-earthquake occurrence or low value-earthquake occurrence before the Hongtong earthquake. |
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| Keywords: | Seismic wave Anomaly characteristics The Hongtong earthquake |
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