摘要
2024年4月3日07时58分(北京时间)在台湾省花莲县海域发生7.3级地震。中国地震局地球物理研究所在震后启动快速响应,组织相关领域研究人员对此次地震的震源模型、地震辐射能量等进行了估计,同时基于震源模型进行了震动图模拟、同震形变场模拟。结果表明,此次地震发生在菲律宾海板块和欧亚板块的边界,以逆冲机制为主,呈现双侧破裂,能量集中在前约35 s内释放;极震区震动烈度可能达Ⅹ度以上,可能的受灾范围近35 000 km^(2);此次地震引起了显著的同震位移,最大水平向位移达到0.52 m、垂直向位移达到1.18 m。
On April 3,2024,at 07:58(Beijing time),a magnitude 7.3 earthquake occurred in the waters of Hualien County,Taiwan Province.The Institute of Geophysics,China Earthquake Administration initiated a rapid response after the earthquake and organized geophysics researchers to estimate the source model and seismic radiation energy of the earthquake.Based on the source model,the shakemap and coseismic deformation field simulation were carried out.The results indicate that the earthquake occurred at the boundary between the Philippine Sea Plate and the Eurasian Plate,primarily characterized by a thrust mechanism,with energy released predominantly in the first 35 seconds.The earthquake intensity in the extreme seismic area possibly have reached more than X degree,with a potential disaster area of approximately 35000 km^(2).The earthquake also caused significant coseismic displacements,with the maximum horizontal displacement reaching 0.52 m and the vertical displacement reaching 1.18 m.
作者
王钦莹
陈鲲
王永哲
张旭
张喆
王子博
Wang Qinying;Chen Kun;Wang Yongzhe;Zhang Xu;Zhang Zhe;Wang Zibo(Institute of Geophysics,China Earthquake Administration,Beijing 100081,China)
出处
《地震科学进展》
2024年第4期286-291,共6页
Progress in Earthquake Sciences
基金
中国地震局地球物理研究所基本科研业务专项:基于显著非双力偶震源的辐射能量测定方法(DQJB23K43)和“微震震级及能量算法优化”课题(0723302)联合资助。
关键词
台湾地震
震源模型
地震动强度预测
地震辐射能量
INSAR
同震形变场
the Taiwan earthquake
seismic source model
shakemap prediction
earthquake radiation energy
InSAR
coseismic deformation
