2020年1月19日伽师M_(S)6.4地震第二类地脉动信号特征分析  

CHARACTERISTICS ANALYSIS OF DOUBLE FREQUENCY MICROSEISMS BEFORE AND AFTER JIASHI M_(S)6.4 EARTHQUAKE ON JANUARY 19,2020

作　　者：欧雪慧 陈丽[1] 丁宇 阿卜杜塔伊尔·亚森[1] OU Xue-hui;CHEN Li;DIN Yu;Abudutayier Yasen(Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830011,Xinjiang,China)

机构地区：[1]新疆维吾尔自治区地震局,新疆乌鲁木齐830011

出　　处：《内陆地震》2025年第1期44-52,共9页Inland Earthquake

基　　金：新疆地震青年科学基金(202307).

摘　　要：利用新疆乌什连续重力观测资料,分析伽师M_(S)6.4地震发震前后乌什站功率谱密度随时间的变化及视垂直位移值特征,结合全球地震背景噪声能量辐射模型(ASSM),探讨可能影响第二类地脉动异常变化的因素。结果表明,伽师M_(S)6.4地震震前第二类地脉动异常变化受台风、海浪、气象等因素影响不大,可能为地震震前扰动。研究第二类地脉动特征,将会对地震预报具有一定意义。Using the continuous gravity data observation data of Xinjiang Wushi station,analyze the change of power spectral density with time,calculate the vertical displacement of the double frequency microseisms,and combine with the Ardhuin seismic spectra model(ASSM)to explore the influencing factors that may affect the double frequency microseism,The results show that the anomalous change of the double frequency microseism before the Jiashi M_(S)6.4 earthquake is not affected by the typhoon,waves and meteorological factors,and it may be a pre-seismic perturbation of the earthquake.The study of the double frequency microseism characteristics will have implications for earthquake forecasting.

关 键 词：第二类地脉动 伽师M_(S)6.4地震 震前异常 ASSM模型 

分 类 号：P315.7[天文地球—地震学]