张从珍, 刘继录, 杜迎春. 张北5.6级地震前P波出射角和方位角的异常变化[J]. 华北地震科学, 2002, 20(1): 43-48.
引用本文: 张从珍, 刘继录, 杜迎春. 张北5.6级地震前P波出射角和方位角的异常变化[J]. 华北地震科学, 2002, 20(1): 43-48.
ZHANG Cong-zhen, LIU Ji-lu, DU Ying-chun. THE ABNORMAL VARIATION OF P WAVE EMERGENT ANGLE AND AZIMUTH ANGLE BEFORE ZHANGBEI M5.6 EARTHQUAKE[J]. North China Earthquake Sciences, 2002, 20(1): 43-48.
Citation: ZHANG Cong-zhen, LIU Ji-lu, DU Ying-chun. THE ABNORMAL VARIATION OF P WAVE EMERGENT ANGLE AND AZIMUTH ANGLE BEFORE ZHANGBEI M5.6 EARTHQUAKE[J]. North China Earthquake Sciences, 2002, 20(1): 43-48.

张北5.6级地震前P波出射角和方位角的异常变化

THE ABNORMAL VARIATION OF P WAVE EMERGENT ANGLE AND AZIMUTH ANGLE BEFORE ZHANGBEI M5.6 EARTHQUAKE

  • 摘要: 选用了张家口台记录的P波三分向的初动振幅,计算其出射角及方位角的大小。研究了1999年3月11日张北5.6级地震前出射角与方位角出现的异常变化,并对地震前异常现象进行了初步讨论。

     

    Abstract: the emergent angle and azimuth angle are calculated with the three components onset amplitude of P wave recored by Zhangjiakou Seismostation.The abnormal variations of the emergent angle and azimuth angle on Mar.11, 1999, before Zhangbei M5.6 earthquake are studied, and the anomalies before the event are also discussed.

     

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