| 乌鲁木齐及附近地区剪切波分裂特征研究 |
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| 引用本文： | 曲延军,赵翠萍,赵建政,马宝柱,聂晓红,孙甲宁,上官文明.乌鲁木齐及附近地区剪切波分裂特征研究[J].内陆地震,2004,18(3):212-220. |
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| 作者姓名： | 曲延军 赵翠萍 赵建政 马宝柱 聂晓红 孙甲宁 上官文明 |
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| 作者单位： | 新疆维吾尔自治区地震局,新疆,乌鲁木齐,830011 |
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| 基金项目： | 十五重点科研项目，100501-01-07、十五2001BA601B01-03-03，中国地震局三结合课题，200111资助. |
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| 摘 要： | 利用S波分裂的方法，分析了2003年2月14日新疆石河子5．4级地震前后多台所记录的小地震的S波分裂特征，发现震源附近地区的S波分裂特征对中强震仍有一定的前兆意义．震中附近的3个地震台记录的S波偏振方向在5．4级地震前出现由原来与区域应力场一致的NE向转为NW向震后又转回NE向。5．4级地震前各台记录的慢波延迟时间总体表现出由小变大的特征．
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| 关 键 词： | S波分裂 慢波延迟时间 快波偏振方向 新疆 |
| 文章编号： | 1001-8956(2004)03-0212-09 |
| 修稿时间： | 2004年2月24日 |
STUDY ON SHEAR-WAVE SPLIT CHARACTER IN URUMQI,XINJIANG,AND ITS ADJACENT AREA |
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| QU Yan-jun,ZHAO Cui-ping,ZHAO Jian-zheng,MA Bao-zhu,NIE Xiao-hong,SUN Jia-ning,SHANGGUAN Wen-ming.STUDY ON SHEAR-WAVE SPLIT CHARACTER IN URUMQI,XINJIANG,AND ITS ADJACENT AREA[J].Inland Earthquake,2004,18(3):212-220. |
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| Authors: | QU Yan-jun ZHAO Cui-ping ZHAO Jian-zheng MA Bao-zhu NIE Xiao-hong SUN Jia-ning SHANGGUAN Wen-ming |
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| Abstract: | We used S-wave split method to analyze the S-wave split character of small shocks recorded by many stations before the Shihezi, Xinjiang, around M \-S5.4 earthquake on Feb. 14, 2003, and found the S-wave split character around the epicenter shown some precursor of the event. Before the shock, the S-wave polarization direction that recorded by 3 stations around the epicenter turned to NW from NE consistent with the direction of regional stress field; but after the shock, it turned to NE again. And in general, the slow wave delay time shown the feature from short to long before the earthquake. |
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| Keywords: | S-wave split Slow wave delay time Fast wave polarization direction Xinjiang |
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