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| 甘东南地区地震重新定位研究 | |
| 引用本文： | 莘海亮,刘明军,张元生,曾宪伟,胡中民.甘东南地区地震重新定位研究[J].地震研究,2010,33(3). |
| 作者姓名： | 莘海亮 刘明军 张元生 曾宪伟 胡中民 |
| 作者单位： | 1. 中国地震局地球物理勘探中心,郑州,450002 2. 中国地震局兰州地震研究所,兰州,730000 3. 宁夏回族自治区地震局,银川,750001 |
| 基金项目： | 国家自然科学基金项目(40674043;90814001)资助.中国地震局地球物理勘探中心论著号:0908 |
| 摘 要： | 将双差地震定位法与遗传算法相结合,对2001～2007年甘东南地区的地震进行了重新定位。结果显示:重新定位后地震在空间分布上更加集中,部分地区的地震有向构造带趋近的变化。地震震源平均深度为14.6km,5～20km深度为该区多震层深度范围。3次5级以上中强地震的震中均处于主干活动断裂边缘。震源深度分布与断裂构造的关系刻画出剖面沿线不同断裂的深部展布特征,部分断裂延伸到中、下地壳。 |
| 关 键 词： | 双差定位 遗传算法 震源深度 多震层 甘东南地区 |
Relocation of the Earthquakes in the Southeast Area of Gansu |
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| XIN Hai-liang,LIU Ming-jun,ZHANG Yuan-sheng,ZENG Xian-wei,HU Zhong-min.Relocation of the Earthquakes in the Southeast Area of Gansu[J].Journal of Seismological Research,2010,33(3). | |
| Authors: | XIN Hai-liang LIU Ming-jun ZHANG Yuan-sheng ZENG Xian-wei HU Zhong-min |
| Institution: | XIN Hai-liang1,LIU Ming-jun1,ZHANG Yuan-sheng2,ZENG Xian-wei3,HU Zhong-min1(1.Research Center of Exploration Geophysics,China Earthquake Administration,Zhengzhou 450002,Henan,China)(2.Lanzhou Institute of Seismology,Lanzhou 730000,Gansu,China)(3.Earthquake Administration of Ningxia Hui Autonomous Region,Yinchuan 750001,Ningxia,China) |
| Abstract: | We relocate earthquakes occurred in the southeast area of Gansu from 2001 to 2007 using double-difference method and genetic algorithm method.The result shows that the earthquakes are more spatially concentrated and in some areas the earthquakes tend to get close to tectonic belts.The average hypocenter depth is 14.6 km and the seismogenic layer ranges from 5 km to 20 km.After relocating three moderately strong earthquakes,we find that they were all occurred in the edge of the main active faults.The relatio... |
| Keywords: | double-difference algorithm genetic algorithm focal depth seismogenic layer southeast area of Gansu |
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