2023年甘肃积石山6.2级地震序列精定位  

Relocation of the 2023 M_(s)6.2 Jishishan Earthquake Sequence in Gansu Province

作　　者：左可桢 赵翠萍[1] ZUO Ke-zhen;ZHAO Cui-ping(Institute of Earthquake Forecasting,China Earthquake Administration,Beijing 100036,China)

机构地区：[1]中国地震局地震预测研究所,北京100036

出　　处：《地震》2024年第1期204-208,共5页Earthquake

基　　金：中国地震局监测司监测运维项目“大震应急快速产出”。

摘　　要：本文使用结合波形互相关技术的双差定位方法,对2023年甘肃积石山6.2级地震序列(截至2023年12月22日24时)进行了重定位。结果显示,主震震中位于临夏州积石山县(35.745°N, 102.827°E),震源深度约为12.5 km。余震序列呈现出NW和NNW两个展布方向。其中主震西侧的余震条带呈NW向展布,深度方向上向NE方向倾斜。重定位结果显示了该地区具有复杂的构造背景和发震机制。This study used the double-difference earthquake location method combined with waveform cross-correlation technique to relocate the M_(s)6.2 Jishishan earthquake sequence(As of 24:00 on December 22,2023)in Gansu Province.The results show that the epi-center of the M_(s)6.2 Jishishan earthquake is located at Jishishan County,Linxia Prefecture(35.745°N,102.827°E)and the focal depth is about 12.5 km.The aftershock sequence formed two branches in different directions,which were NW and NNW.The aftershocks near the M_(s)6.2 Jishishan earthquake are distributed in an NW direction,and tilted toward the NE.The relocation results reveal the complex tectonic environment of the region.

关 键 词：积石山地震 地震精定位 余震空间分布 发震构造 

分 类 号：P315.7[天文地球—地震学]