eprintid: 1295 rev_number: 17 eprint_status: archive userid: 2 dir: disk0/00/00/12/95 datestamp: 2015-02-10 12:40:21 lastmod: 2017-02-08 12:21:33 status_changed: 2015-04-27 12:10:38 type: article metadata_visibility: show creators_name: Deng, Kai creators_name: Zhou, Shiyong creators_name: Wang, Rui creators_name: Robinson, Russell creators_name: Zhao, Cuiping creators_name: Cheng, Wanzheng creators_id: creators_id: zsy@pku.edu.cn creators_id: creators_id: GNS Science, Lower Hutt, New Zealand 5040 creators_id: creators_id: corp_creators: School of Earth and Space Science, Peking University, Beijing, China corp_creators: School of Earth and Space Science, Peking University, Beijing, China corp_creators: School of Earth and Space Science, Peking University, Beijing, China corp_creators: GNS Science, Lower Hutt, New Zealand corp_creators: Institute of Earthquake Science of CEA, Beijing, China corp_creators: Seismological Bureau of Sichuan Province of China, Chengdu, China title: Evidence that the 2008 Mw 7.9 Wenchuan Earthquake Could Not Have Been Induced by the Zipingpu Reservoir ispublished: pub subjects: RC2 subjects: SR subjects: SS divisions: EPOS-P full_text_status: none abstract: According to the Coulomb failure criterion the variation of either shear stress, normal stress, or pore pressure can affect the occurrence, or not, of earthquakes. Abnormal seismicity increases around reservoirs are often thought to be induced by the water impounded behind the dam, which leads to nearby increases in crustal pore pressure and Coulomb stress, and so may promote the nearby faults to fail. To investigate how much the Zipingpu reservoir, whose dam is just a few hundred meters from the Longmen Shan fault, influenced the 12 May 2008 Wenchuan earthquake Mw 7.9, we calculated the Coulomb stress variation induced by the filling of the Zipingpu reservoir, which began in October 2005. We also analyzed the correlation between local seismicity variations and the induced Coulomb stress variations. Both the calculated Coulomb stress variations and the observed seismicity analysis suggest that the probability that the huge Wenchuan earthquake, Mw 7.9, was induced by the Zipingpu reservoir is very low. The filling of the Zipingpu reservoir could only result in an increase in the rate of shallow earthquakes with hypocenter depth smaller than 5 km near the reservoir region. date: 2010-11 date_type: published publication: Bulletin of the Seismological Society of America volume: 100 number: 5B publisher: Seismological Society of America pagerange: 2805-2814 id_number: doi:10.1785/0120090222 refereed: TRUE issn: 0037-1106 official_url: http://dx.doi.org/10.1785/0120090222 access_IS-EPOS: limited owner: Publisher citation: Deng, Kai and Zhou, Shiyong and Wang, Rui and Robinson, Russell and Zhao, Cuiping and Cheng, Wanzheng (2010) Evidence that the 2008 Mw 7.9 Wenchuan Earthquake Could Not Have Been Induced by the Zipingpu Reservoir. Bulletin of the Seismological Society of America, 100 (5B). pp. 2805-2814. DOI: https://doi.org/10.1785/0120090222