地形变观测揭示的汶川Ms8.0级地震同震响应与影响

基金项目: 中国地震局地震预测研究所基本科研业务专项基金资助项目(青藏块体东北部强震孕育-发生动态过程研究)；国家自然科学基金资助项目(40674010)

详细信息

Coseismic Response and Influence of the Wenchuan Ms8.0 Earthquake Revealed by Crustal Deformation Observation

¹Institute of Earthquake Prediction of CEA,63 Fuxing Road,Beijing 100036,China;²The Second Monitoring and Application Center of CEA,316 Xiying Road,Xi'an 710054,China

Funds: 中国地震局地震预测研究所基本科研业务专项基金资助项目(青藏块体东北部强震孕育-发生动态过程研究)；国家自然科学基金资助项目(40674010)

摘要: 利用GPS、跨断层长水准、跨断层短水准与基线等多手段、不同时空尺度地形变观测资料,研究了2008年5月12日四川汶川县Ms8.0级地震同震响应及对周围地区的影响。分析表明了汶川地震发震区呈相当显著的逆冲兼右旋走滑同震变化,大震对其附近的甘川交界东段——甘川陕交界区、鲜水河断裂南段及与龙门山断裂、安宁河断裂的Y字型交汇区及其附近影响相对明显,对其应变积累可能以一定程度增强作用为主。
- 汶川地震 /
- 地形变观测 /
- 同震响应
Abstract: Using crustal deformation observation data with diverse space-time scale,including GPS,long-leveling cross-fault,short-leveling and short-baseline cross-fault,the coseismic response of the Wenchuan Ms8.0 earthquake on 12 May 2008 and its influence on neighborhood are researched.The analysis shows that,the earthquake region displayed remarkable coseismic deformation of thrust and dextral slip,this great earthquake obviously effected the region from eastern segment of boundary between Gansu and Sichuan province to boundary where Gansu,Sichuan and Shaanxi meet,and the southern segment of Xianshuihe fault and the Y-character region where it meet Longmenshan fault and Anninghe fault,mainly reflecting possible enhanced action for strain accumulation,to some degree.
- the Wenchuan earthquake /
- crustal deformation observation /
- coseismic response