摘要
介绍2022年6月24日鄯善M_(S)5.1地震基本参数、地震构造背景、震源机制解、地震序列特征和震前地震活动性异常和地球物理观测异常。结果:①本次地震发生在天山地震带的东段,发震构造为博罗科努-阿奇克库都克断裂,震源错动方式为逆冲型。②此次地震序列类型为孤立型,序列余震不丰富,频度和强度衰减较快。③震前存在地震活动性异常5项,分别为天山中段M_(S)≥4.0地震平静、天山中段M_(S)≥4.0地震增强、天山中段M_(S)3.0-4.9地震增强区、天山中段M_(S)≥3.0增强、M_(S)≥3.0地震条带。④震前存在地球物理场异常2项,为新41井水位和库米什钻孔倾斜EW分量的速率变化异常。
This paper presents the basic parameters,seismotectonic background,focal mechanism solutions,seismic sequence characteristics,seismicity anomalies and geophysical observation anomalies of Shanshan M_(S)5.1 earthquake.The results are as follows:(1)This earthquake occurred in eastern section of the Tianshan seismic zone,and seismogenic tectonics is the Bolokenu-Aqikekuduk Fault,and focal mechanism solutions is thrust type.(2)The earthquake sequence type is isolated,and the sequence aftershocks are not abundant,with a rapid decay in frequency and intensity.(3)Five seismic activity anomalies existed before the earthquake,namely,M_(S)≥4.0 earthquake calm,M_(S)≥4.0 earthquake enhancement,M_(S)3.0-4.9 earthquake enhancement zone,M_(S)≥3.0 enhancement and M_(S)≥3.0 earthquake belt in the middle part of the Tianshan.(4)Two geophysical observation anomaly exists before the earthquake,which is No.41 well static water level and the rate variation anomaly of the EW component of the Kumish borehole inclinometer.
作者
高荣
聂晓红
梁卉
钱才
刘萍
高歌
GAO Rong;NIE Xiao-hong;LIANG Hui;QIAN Cai;LIU Ping;GAO Ge(Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830011,Xinjiang,China)
出处
《内陆地震》
2023年第1期23-31,共9页
Inland Earthquake
基金
新疆地震科学基金(202101).
