Passive seismic experiment and ScS wave splitting in the southwestern subbasin of South China Sea

作     者：RUAN AiGuo LI JiaBiao LEE ChaoShing QIU XueLin PAN ShaoJun 

作者机构：The Second Institute of OceanographyState Oceanic AdministrationHangzhou 310012China Institute of Applied GeosciencesTaiwan Ocean UniversityKeelung 20224China South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China 

出 版 物：《Chinese Science Bulletin》 (中国科学通报)

年 卷 期：2012年第57卷第25期

页      面：3381-3390页

核心收录：

学科分类：07[理学] 0708[理学-地球物理学] 

基　　金：supported by the National Natural Science Foundation of China (91028006,40876035 and 41106053) the National Basic Research Program of China (2007CB411701) 

主　　题：地震实验 中国南海 西南海盆 分裂 三维数组 数据分析 参数反演 各向异性 

摘      要：The seismic experiment of 3D array of OBS in the southwestern sub-basin of the South China Sea(SCS) is briefly introduced in this *** data analysis of broadband OBS shows that totally 93 earthquakes with magnitude of Ms 6.0-6.9 and 10 earthquakes with magnitude above Ms 7.0 were recorded in high quality during this experiment,especially the catastrophic earthquake Ms 9.0 occurred in the east sea area of Japan on March 11,*** anisotropy parameters inversion of ScS wave of four events above Ms 7.0 indicates that the fast direction of shear wave is N58°E parallel to the ceased spreading ridge of the southwestern sub-basin of SCS(the slow direction is S35°E perpendicular to the spreading ridge),which means the spreading ridge is under compressing stress at present and the cessation of seafloor spreading is related to such stress field as well.