Gravity evolution and earthquake activities of the northeastern edge of Qinghai-Xizang block

作     者：祝意青 李辉 朱桂芝 徐云马 

作者机构：Second Crust Monitoring and Application CenterChina Earthquake AdministrationXi′an 710054China Institute of SeismologyChina Earthquake AdministrationWuhan 430071China 

出 版 物：《Acta Seismologica Sinica(English Edition)》 (地震科学)

年 卷 期：2004年第17卷第z1期

页      面：76-84页

核心收录：

学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：Key Project of China Earthquake Administration during the tenth Five-year Plan (100501-05-05) 

主　　题：northeastern edge of Qinghai-Xizang block gravity evolution tectonic activity seismogenic characteristics 

摘      要：The relationship between temporal-spatial evolution of gravity and earthquake activity during 1992~2001 has been analyzed systematically by integrally adjusting the gravity observation data of the northeastern edge of Qinghai- Xizang (Qingzang) block. The result shows that the gravity observation data of the northeastern edge of Qingzang block obtained by using the uniform starting datum can completely reflect the precursory gravity information appearing during the seismogenic process. In the genesis stage of an earthquake, regional gravity anomaly appears in a large area, resulting in related local gravity anomaly. The dynamic image of gravity field can clearly reflect the orderly evolution and earthquake activity.