| 用两个台上的S波位移求震源地方岩体錯动的方向 |
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| 引用本文： | 郭增建.用两个台上的S波位移求震源地方岩体錯动的方向[J].地球物理学报,1960,9(1):20-24. |
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| 作者姓名： | 郭增建 |
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| 作者单位： | 中国科学院地球物理研究所 |
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| 摘 要： | 这种方法的基本根据是:（一）震源地方岩体錯动的方向与横波离源时的方向、横波离源时的射綫方向在一个平面內;（二）横波在传播过程中,β角变化很小. 推导了由S波β角求横波离源时位移方向的公式.由两个台上的S波β角就可分別求得两个横波离源时的位移面,这两个面的交綫就是震源地方岩体錯动的方向。討論了在烏尔夫网上具体运用这一方法的作图.这就大大地簡化了求解的过程,便于大量处理数据。
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| 关 键 词： | 横波 位移方向 震源球 岩体 震源机制 方位角 地震台 入射面 投影 水平面 |
FAULT-PLANE DETERMINATION BY MEANS OF 5-WAVES RECORDED AT TWO STATIONS |
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| KUO TSENG-CHIEN.FAULT-PLANE DETERMINATION BY MEANS OF 5-WAVES RECORDED AT TWO STATIONS[J].Chinese Journal of Geophysics,1960,9(1):20-24. |
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| Authors: | KUO TSENG-CHIEN |
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| Institution: | Institute of Geophysics and Meteorology, Academia Sinica |
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| Abstract: | The method proposed here is based on the following facts: （1） At the focus, the direction of movement of the rock masses, the displacement of the S waves and the direction of the rays of the S waves all lie in one plane; and （2） the variation of the angle β in the course of propagation is very small. A formula is derived for finding the direction of displacement of the S wave on leaving the focus in terms of the angle β. From the β's obtained at two stations, it is possible to determine the planes of vibration of two S waves, whose intersection gives the direction of movement of the rock masses. The application of the method by use of Wulff s projection is also discussed. |
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