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| 华北地区大地震矩释放率和GPS应变率的一致性研究 | |
| 引用本文： | 万永革,沈正康,甘卫军,王爱军.华北地区大地震矩释放率和GPS应变率的一致性研究[J].中国地震,2005,21(1):33-40. |
| 作者姓名： | 万永革 沈正康 甘卫军 王爱军 |
| 作者单位： | 1. 中国地震局地质研究所,地震动力学国家重点实验室,北京 德外祁家豁子 100029;中国地震局防灾技术高等专科学校,北京,东燕郊,101601 2. 中国地震局地质研究所,地震动力学国家重点实验室,北京 德外祁家豁子 100029;Dept of Earth and Space Sciences,Universiry of California,Los Angeles,CA 90095-1567 USA 3. 中国地震局地质研究所,地震动力学国家重点实验室,北京,德外祁家豁子,100029 4. 河北省馆陶县中学,河北省,馆陶,057750 |
| 基金项目： | 科技部重大基础前期研究 ( 2 0 0 3CCB0 0 60 0 )，国家自然科学基金 ( 4 0 1740 19和 40 3 740 12 )共同资助 |
| 摘 要： | GPS测量技术可以在较大地区范围内获得高精度地壳形变速率。稳定的应变速率提供了精确确定地震活动率的机会。本文运用Kostrov(1974)的公式将经平滑的华北地区应变速率转化为矩释放率，并与运用1303年洪洞地震以来的地震目录计算的矩释放率进行比较，发现两者之比南北向为60．6％，东西向为68．9％，北东剪切分量为104．1％。近似为1的比率表明了GPS测量结果的可靠性。这个结果对结合历史地震及大地形变测量估计矩释放进行地震危险性评估具有一定参考意义。 |
| 关 键 词： | 华北地区 地震矩 震级 积累应变 |
| 文章编号： | 1001-4683(2005)01-033-08 |
On the Consistency of Large Earthquake Moment and Strain Rate Inferred from GPS Data in North China |
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| Wan Yongge,Shen Zhengkang,Gan Weijun,WANG Aijun.On the Consistency of Large Earthquake Moment and Strain Rate Inferred from GPS Data in North China[J].Earthquake Research in China,2005,21(1):33-40. | |
| Authors: | Wan Yongge Shen Zhengkang Gan Weijun WANG Aijun |
| Institution: | Wan Yongge 1,2) Shen Zhengkang 1,3) Gan Weijun 1) Wang Aijun 4) 1)State Key Laboratory of Earthquake Dynamics,Institute of Geology,China Earthquake Administration,Beijing 100029,China 2)College of Disaster Prevention Techniques,Yanjiao 101601,Sanhe China 3)Dept. of Earth and Space Sciences,University of California,Los Angeles,CA 90095-1567,USA 4)Middle School of Guantao County,Hebei Province,Guantao 057750,China |
| Abstract: | The new GPS data can map crustal strain rates over large areas with a useful degree of precision. Stable strain indicators open the door for space geodesy to join with seismology in formatting improved estimates of earthquake recurrence. The Kostrov's formula (1974) translates the smoothed strain rates in North China into geodetic moment rates. In North China, the ratio of seismic monent released to moment accumulated from GPS measurement is 60.6% in NS direction, 68.9% in EW direction, and 104.1% in NE shear direction. The near unit ratio points to the reliability of GPS measurements there. The combination of historical seismicity and GPS measurement offers a powerful attack on earthquake hazard. |
| Keywords: | North China Seismic moment Surface magnitude Deformation accumulation |
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