摘要
2002年6月29日在吉林汪清(43.5°N,130.6°E)发生Mb7.2地震,深度593km。该次地震是2001年11月14日昆仑山口西地震后,我国大陆发生的一次重要地震事件。该稿首先讨论了深震区与昆仑山地震带强地震活动之间的关系,并对该地区观测的倾斜和短水准近几年的变化进行了研究,给出了与地震相关的形变场异常场特征:①震前2～3年开始出现较大幅度的倾斜异常阶跃;②东北地区地倾斜存在远离震源的特征迁移;③华北地区短水准出现特征波形异常,并沿痰庐地震带迁移。
On June 29, 2002, an earthquake with magnitude of 7.2 and depth of 593 km occurred in Wangqing County, Jilin Province. This is an important event since Kunlun Mountain earthquake occurred on November 14 of 2001. This paper discussed the possible relation between both areas' seismicity and characteristics of ground tilt and short leveling variations in recent years. Finally, the characteristics of deformation fields related to seismicity are proposed: ① Anomalous steps of ground deformation may be observed 2～4 years before the earthquake occurrence. ② The characteristics of ground tilts near the source in Northeast China region migrated away. ③ Anomaly images of short leveling in North China region showed wave anomaly, which migrated toward Tancheng-Lujiang fault zone.
出处
《地震》
CSCD
北大核心
2004年第1期76-81,共6页
Earthquake
基金
地震科学联合基金项目(102069)
关键词
地震活动
形变场
异常
迁移
吉林
Ground deformation
Deep earthquake
Leveling
Northeast China region
