| Inversion of coseismic stress-triggered fault slips using borehole strainmeter observations |
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| 作者姓名： | 邱泽华 阚宝祥 唐磊 张超凡 宋茉 |
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| 作者单位： | [1]Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China [2]Graduate University of the Chinese Academy of Sciences, Beijing 100039, China |
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| 摘 要： | Coseismic stress-triggering is becoming a new hot spot of research. Coseismic strain steps recorded by borehole strainmeters are particularly valuable in studying coseismic stress-triggered fault slips. Based on the theory of dis location, one can invert the triggered fault slips with such data if he/she has a well understanding about the local faults. Genetic algorithm can be applied to significantly raise the efficiency of searching a best solution among all possibilities in this kind of inversion. A testifying check of the program and analyses of each parameter＇s influence may further enhance the reliability of inversion results. Taking complexity of geological structure into account, the inversion results should be regarded as the predominant property or a comprehensive effect of triggered local faults＇ activities. As an attempt, we inverted the assumingly active faults＇ slips triggered by the Ms=8.1 Kunlun Mountain earthquake over Beijing area.
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| 关 键 词： | 地震 地应力 应力场 遗传算法 昆仑山 |
| 文章编号： | 1000-9116（2006）06-0643-07 |
| 收稿时间： | 2006-04-03 |
| 修稿时间： | 2006-08-21 |
Inversion of coseismic stress-triggered fault slips using borehole strainmeter observations |
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| QIU Ze-hua,KAN Bao-xiang,TANG Lei,ZHANG Chao-fan,SONG Mo.Inversion of coseismic stress-triggered fault slips using borehole strainmeter observations[J].Acta Seismologica Sinica(English Edition),2006,19(6):643-649. |
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| Authors: | QIU Ze-hua KAN Bao-xiang TANG Lei ZHANG Chao-fan SONG Mo |
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| Institution: | 1. Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China
2. Graduate University of the Chinese Academy of Sciences, Beijing 100039, China |
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| Abstract: | Coseismic stress-triggering is becoming a new hot spot of research. Coseismic strain steps recorded by borehole strainmeters
are particularly valuable in studying coseismic stress-triggered fault slips. Based on the theory of dislocation, one can
invert the triggered fault slips with such data if he/she has a well understanding about the local faults. Genetic algorithm
can be applied to significantly raise the efficiency of searching a best solution among all possibilities in this kind of
inversion. A testifying check of the program and analyses of each parameter’s influence may further enhance the reliability
of inversion results. Taking complexity of geological structure into account, the inversion results should be regarded as
the predominant property or a comprehensive effect of triggered local faults’ activities. As an attempt, we inverted the assumingly
active faults’ slips triggered by the M
S=8.1 Kunlun Mountain earthquake over Beijing area.
Foundation item: National Natural Science Foundation of China (40374011) and Joint Seismological Science of China (1040037). |
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| Keywords: | coseismic strain step stress triggering inversion dislocation genetic algorithm (GA) the Kunlun Mountain earthquake |
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