| 宁夏及邻近地区震源机制解特征 |
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| 引用本文： | 赵知军,刘秀景,康凌燕.宁夏及邻近地区震源机制解特征[J].西北地震学报,2002,24(2):162-166,173. |
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| 作者姓名： | 赵知军 刘秀景 康凌燕 |
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| 作者单位： | 宁夏回族自治区地震局,宁夏,银川,750001 |
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| 摘 要： | 采用在吴尔夫网上作图的方法求得了宁夏及邻近地区 372个地震震源机制解 ,再以各次地震的主压、主张应力轴资料在吴尔夫网上求出了该地区主压应力方向和主张应力方向 .其P轴的优势方向在北东 30°～ 70°之间 ;T轴的优势方向在北西 30 0°～ 330°之间 .由该地区主压和主张应力以近水平方向为主 ,认为发生地震的断层运动形式是以走滑运动为特征
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| 关 键 词： | 震源机制解 主压应力 主张应力 走滑运动 |
| 文章编号： | 1000-0844(2002)02-0162-05 |
| 收稿时间： | 2001/5/23 0:00:00 |
FEATURES OF FOCAL-MECHANISM SOLUTIONS IN NINGXIA AND ITS NEIGHBORING REGION |
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| ZHAO Zhi-jun,LIU Xiu-jing and KANG Ling-yan.FEATURES OF FOCAL-MECHANISM SOLUTIONS IN NINGXIA AND ITS NEIGHBORING REGION[J].Northwestern Seismological Journal,2002,24(2):162-166,173. |
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| Authors: | ZHAO Zhi-jun LIU Xiu-jing and KANG Ling-yan |
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| Institution: | Seismological Bureau of Ningxia Hui Autonomous Region, Yinchuan 750001, China,Seismological Bureau of Ningxia Hui Autonomous Region, Yinchuan 750001, China and Seismological Bureau of Ningxia Hui Autonomous Region, Yinchuan 750001, China |
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| Abstract: | The focal-mechanism solutions of 372 earthquakes in Ningxia and its neighboring regions are evaluated by using Nulff net. Basing on these data the direction of principal compressive stress and principal strain stress in this region are obtained by use Wulff net again. The dominant direction of P axle is NE 30°~70°,and one of T axle is NW 300°~330°. According main acting force is horizontal or nearly horizontal,most of the tectonic faults which causing earthquake should be strike-slip or nearly strike-slip faults. |
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| Keywords: | Focal mechanism solution Principal compressive stress Principal strain stress Strike slip movement |
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