| 四川地区Sn波偏振 |
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| 引用本文： | 陈天长,范军.四川地区Sn波偏振[J].四川地震,1996(4):85-90. |
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| 作者姓名： | 陈天长 范军 |
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| 作者单位： | 四川省地震局第二研究所 |
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| 摘 要： | 本文分析了１９９４年、１９９５年成都遥测地震台网实时处理系统记录的５０多个ＭＬ３．０～４．０级地震的Ｓｎ波偏振，研究这一地区地壳介质的各向异性．结果表明，在短周期三分向地震图上，对来自不同传播方向的，有可靠到时的Ｓｎ波偏振是一致的，其优势取向与其它方法观测的这一地区最大水平主压应力方向相同。这意味着，这一地区地壳介质存在地震波各向异性。
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| 关 键 词： | 四川，Sn偏振，地壳介质，各向异性 |
Sn Wave Polarization in Sichuan Region |
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| Cheng Tianchang, Fan Jin, Zheng Jian.Sn Wave Polarization in Sichuan Region[J].Earthquake Research in Sichuan,1996(4):85-90. |
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| Authors: | Cheng Tianchang Fan Jin Zheng Jian |
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| Institution: | Seismological Bureau of Sichuan Province |
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| Abstract: | The Sn wave polarization data that consists from about fifty earthquakes (ML3. 0 ML4.0) recorded by the telemetric seismic network of Chengdu from 1994 to 1995 are processed for the research purpose of anisotropy of crustal meduim in Sichuan region. The resultshows that the Sn wave polarization which have exact arrival time from all directions is consistent. The superior direction of Sn wave polarization is parallel to the direction of max horizontal stress obtained from other method. The crustal medium is anisotropy to seismic wavepropagation from our research. |
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| Keywords: | Sichuan Sn wave polarization crustal medium anisotropy |
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