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| Gravity variation before Kunlun mountain pass western M_s=8.1 earthquake | |
| 引用本文： | 祝意青,王双绪,江在森,朱桂芝,李辉,张永志. Gravity variation before Kunlun mountain pass western M_s=8.1 earthquake[J]. 地震学报(英文版), 2003, 16(3) |
| 作者姓名： | 祝意青 王双绪 江在森 朱桂芝 李辉 张永志 |
| 作者单位： | The Second Crustal Deformation Monitoring Center，China Seismological Bureau，Xi'an 710054，China，The Second Crustal Deformation Monitoring Center，China Semsmological Bureau，Xi'an 710054，China，Center for Analysis and Prediction，China Seismological Bureau，Beijing 100036，China，The Second Crustal Deformation Monitoring Center，China Seismological Bureau，Xi'an 710054，China，Institute of Seismology，China Seismological Bureau，Wuhan 430071，China，The Second Crustal Deformation Monitoring Center，China Seismological Bureau，Xi'an 710054，China |
| 基金项目： | The Development and Planning Project of National Important Base Research (G1998040703) |
| 摘 要： | AbstractThe relation between the gravity variation features and M_S=8.1 earthquake in Qinghai-Xizang monitoring area isanalyzed preliminarily,by using spatial dynamic variation results of regional gravity field from absolute gravityand relative gravity observation in 1998 and 2000.The results show that:1)M_S=8.1 earthquake in Kulun mountainpass western occurred in the gravity variation high gradient near gravity's high negative variation; 2)The maintectonic deformation and energy accumulation before M_S=8.1 earthquake are distributed at south side of theepicenter;3)The range of gravity’s high negative variation at east of the M_s=8.1 earthquake epicenter relativelycoincides with that rupture region according to field geology investigation; 4)Gravity variation distribution in highnegative value region is just consistent with the second shear strain’s high value region of strain field obtainedfrom GPS observation. |
Gravity variation before Kunlun mountain pass western MS=8.1 earthquake |
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| ZHU Yi-qing WANG Shuang-xu JIANG Zai-sen ZHU Gui-zhi LI Hui ZHANG Yong-zhi ) The Second Crustal Deformation Monitoring Center,China Seismological Bureau,Xi'an ,China) Center for Analysis and Prediction,China Seismological Bureau,Beijing ,China) Institute of Seismology,China Seismological Bureau,Wuhan ,China. Gravity variation before Kunlun mountain pass western MS=8.1 earthquake[J]. Acta Seismologica Sinica(English Edition), 2003, 16(3) | |
| Authors: | ZHU Yi-qing WANG Shuang-xu JIANG Zai-sen ZHU Gui-zhi LI Hui ZHANG Yong-zhi ) The Second Crustal Deformation Monitoring Center China Seismological Bureau Xi'an China) Center for Analysis Prediction China Seismological Bureau Beijing China) Institute of Seismology China Seismological Bureau Wuhan China |
| Affiliation: | 1. The Second Crustal Deformation Monitoring Center, China Seismological Bureau, Xi'an 710054, China 2. Center for Analysis and Prediction, China Seismological Bureau, Beijing 100036, China 3. Institute of Seismology, China Seismological Bureau, Wuhan 430071, China |
| Abstract: | The relation between the gravity variation features and Ms=8.1 earthquake in Qinghai-Xizang monitoring area is analyzed preliminarily, by using spatial dynamic variation results of regional gravity field from absolute gravity and relative gravity observation in 1998 and 2000. The results show that: 1) Ms=8.1 earthquake in Kulun mountain pass western occurred in the gravity variation high gradient near gravit/s high negative variation; 2) The main tectonic deformation and energy accumulation before Ms=8.1 earthquake are distributed at south side of the epicenter; 3) The range of gravity's high negative variation at east of the Ms=8.1 earthquake epicenter relatively coincides with that rupture region according to field geology investigation; 4) Gravity variation distribution in high negative value region is just consistent with the second shear strain's high value region of strain field obtained from GPS observation. |
| Keywords: | absolute gravity relative gravity Ms=8.1 earthquake tectonic deformation |
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