| Study of Triggering Action Between the Mani （Ms7.9） and the West Kunlun Mountains Pass （ Ms 8.1 ） Great Earthquakes and Their Dynamic Background |
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| 作者姓名： | Chen Bing Jiang Zaisen Che Shi WANG Qingliang Zhu Guizhi Wang Jiying |
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| 作者单位： | [1]TheSecondCrustalDeformationMonitoringCenter,CSB,Xi＇an710054,China [2]CenterforAnalysisandPrediction,CSB,Beijing100036,China [3]DepartmentofMonitoringandPrediction,CSB,Beijing100036,China |
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| 基金项目： | ThisprojectwassponsoredbytheJointEarthquakeScience
Foundation(10 1118)，andisthekeyprojectofthe“TenthFive_YearPlan”(0 2_0 4_0 6 )，ChinaSeismologicalBureau . |
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| 摘 要： | Based on Coulomb static stress variation, the stress trigging action of the Mani ( Ms7.9, Nov.1997) earthquake on the West Kuulun Mountains Pass (MsS.1, Nov. 2001 ) earthquake is researched. Results of different source mechanism resolutions show that a 10_3 MPa Coulomb stress due to the Mani earthquake was added to the fracture fault of the Kunlun earthquake, and this may shift the broken date to about 10 years earlier, and infer that the stress level in the crust is not low. Comparing the relationship between strong earthquake strength and frequency and earth rotation change, it is shown that the strength‘s decrease and the variation period‘ s shortening of earth rotation are important controlling factors on strong earthquake activity. This great event with Ms = 8.1 took place probably due to a gradual strengthening background of regional stress field within the Qinghai-Xizang block in the period of acceleration of change of day‘s length and stress triggering from the Mani earthquake.
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| 关 键 词： | 库仑 应力触发 地球卫星 昆仑山 地震调查 |
Study of Triggering Action Between the Mani (Ms7.9) and the West Kunlun Mountains Pass ( Ms8.1 ) Great Earthquakes and Their Dynamic Background |
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| Chen Bing,Jiang Zaisen,Che Shi,WANG Qingliang,Zhu Guizhi,Wang Jiying.Study of Triggering Action Between the Mani (Ms7.9) and the West Kunlun Mountains Pass ( Ms8.1 ) Great Earthquakes and Their Dynamic Background[J].Earthquake Research in China,2003,17(3):199-205. |
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| Authors: | Chen Bing Jiang Zaisen Che Shi WANG Qingliang Zhu Guizhi and Wang Jiying |
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| Institution: | The Second Crustal Deformation Monitoring Center, CSB, Xi'an 710054, China;Center for Analysis and Prediction, CSB, Beijing 100036, China;Department of Monitoring and Prediction, CSB, Beijing 100036, China;The Second Crustal Deformation Monitoring Center, CSB, Xi'an 710054, China;The Second Crustal Deformation Monitoring Center, CSB, Xi'an 710054, China;The Second Crustal Deformation Monitoring Center, CSB, Xi'an 710054, China |
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| Abstract: | Based on Coulomb static stress variation, the stress trigging action of the Mani ( M S 7 9, Nov. 1997) earthquake on the West Kunlun Mountains Pass ( M S 8 1, Nov. 2001) earthquake is researched. Results of different source mechanism resolutions show that a 10 -3 MPa Coulomb stress due to the Mani earthquake was added to the fracture fault of the Kunlun earthquake, and this may shift the broken date to about 10 years earlier, and infer that the stress level in the crust is not low. Comparing the relationship between strong earthquake strength and frequency and earth rotation change, it is shown that the strength's decrease and the variation period's shortening of earth rotation are important controlling factors on strong earthquake activity. This great event with M S =8 1 took place probably due to a gradual strengthening background of regional stress field within the Qinghai_Xizang block in the period of acceleration of change of day's length and stress triggering from the Mani earthquake. |
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| Keywords: | Coulomb stress Stress triggering Earth rotation |
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