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| Discussion on ‘Was the 2008 Wenchuan earthquake triggered by Zipingpu Reservoir |
| Shiyong Zhou1, Kai Deng1, Cuiping Zhao2, Wanzheng Cheng3 |
1 School of Earth and Space Sciences, Peking University, Beijing 100871, China
2 Institute of Earthquake Science, China Earthquake Administration, Beijing 100036, China
3 Earthquake Administration of Sichuan Province, Chengdu 610041, China |
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Abstract Some recent publications presented a result suggesting that Zipingpu reservoir hastened the occurrence of the 2008 MS8.0 Wenchuan earthquake by tens to hundreds of years. Their researches calculated the Coulomb stress change induced by Zipingpu reservoir on the rupturing fault of Wenchuan earthquake. Their results, however, are critically dependent upon the 3-D event location, reservoir location, and the fault plane orientation. We repeated Ge et al.’s work in this paper and found that an improper dip angle parameter of their 2-D fault model might lead to a wrong conclusion. Both the modeling results based on the 2-D model and 3-D model with proper fault parameters will show Coulomb stress changes alone were neither large enough nor had the correct orientation to affect the occurrence of Wenchuan earthquake, which supports our recent argument based on the local seismicity analysis and the induced Coulomb stress change calculation with a 3-D model.
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Received: 01 August 2010
Published: 10 December 2010
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| Fund:the Key project of Chinese National Science and Technology (granted No. 40821062) and National Natural science foundation of China (granted Nos. 40574013 and 40821062). |
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Corresponding Authors:
Shiyong Zhou
E-mail: zsy@pku.edu.cn
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Yu Wang, Shengli Ma, Toshihiko Shimamoto, Lu Yao, Jianye Chen, Xiaosong Yang, Honglin He, Jiaxiang Dang, Linfeng Hou, Tetsuhiro Togo. Internal structures and high-velocity frictional properties of Longmenshan fault zone at Shenxigou activated during the 2008 Wenchuan earthquake[J]. Earthquake Science, 2014, 27(5): 499-528. |
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