| 汶川余震前甘陕交界扰动异常的定源探索 |
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| 引用本文： | 张希,王庆良,贾鹏.汶川余震前甘陕交界扰动异常的定源探索[J].中国地震研究,2015,29(2):258-264. |
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| 作者姓名： | 张希 王庆良 贾鹏 |
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| 作者单位： | 中国地震局第二监测中心，西安710054;中国地震局第二监测中心，西安710054;中国地震局第二监测中心，西安710054 |
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| 基金项目： | This research was funded by the Shaanxi Natural Science Foundation as a Subproject of the Project Entitled“Research on Origin of the Large-amplitude Deformation Anomaly in Hancheng and Qianxian Seismic Stations and the Seismic Hazard of Strong Earthquake in the Guanzhong Region”(2014JM2- 4039)． |
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| 摘 要： | Abnormal disturbances, s uch as sharp pulses, w ere observed by vertical pendulum tiltmeters in Wudu, Hanzhong and Ningshaan seismic stations on August 6, 2008.According to the time and spatial location of the anomalies,we build a"source precursor"propagator to calculate possible focal region by aid of quasi-Newton least squares and grid search methods. The calculated focal region is located at the aftershock area of the Wenchuan earthquake on the northern section of Longmenshan fault zone,which may be related to the 54km-away M S5. 0 Pingwu-Beichuan earthquake,with starting time of about thirty three hours before the earthquake.
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| 关 键 词： | Wenchuan aftershock Sharp pulse disturbance Source precursor signal |
| 收稿时间： | 2012/11/26 0:00:00 |
Research on Locating the Source of Abnormal Disturbances in the Border Region of Shaanxi and Gansu |
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| Zhang Xi,Wang Qingliang and Jia Peng.Research on Locating the Source of Abnormal Disturbances in the Border Region of Shaanxi and Gansu[J].Earthquake Research in China,2015,29(2):258-264. |
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| Authors: | Zhang Xi Wang Qingliang and Jia Peng |
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| Institution: | Zhang Xi;Wang Qingliang;Jia Peng;The Second Monitoring and Application Center CEA; |
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| Abstract: | |
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| Keywords: | Wenchuan aftershock Sharp pulse disturbance Source precursor signal |
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