台风对山东连续重力固体潮观测影响特征分析  

Study on typhoon effect of gravity tide change in Shandong

作　　者：郝军丽[1] 张正帅[1] 赵洋 杜存鹏 HAO Junli;ZHANG Zhengshuai;ZHAO Yang;DU Cunpeng(Shandong Earthquake Agency,Jinan 250014,China)

机构地区：[1]山东省地震局,中国济南250014

出　　处：《地震地磁观测与研究》2023年第4期111-118,共8页Seismological and Geomagnetic Observation and Research

摘　　要：以2020年“巴威”“美莎克”和2018年“安比”台风期间泰安地震台、嘉祥地震台、济南地震台的连续重力固体潮为研究对象,通过滤波提取出与台风有关的固体潮信号,采用傅里叶变换分析台风可能引起的高频信号功率谱特征。结果表明,固体潮信号的强弱与台风中心到台站间的距离呈负相关,与台风中心速度呈正相关,与台风中心气压成负相关。3次台风引起的重力扰动主要频率为0.20—0.25 Hz。在0.001—0.100 Hz也有能量分布,优势部分主要为0.001—0.050 Hz,从信号出现时间和强度方面分析认为,此频段信号仍有可能主要是受台风的干扰影响。Using the continuous gravity tides data from the Tai’an,Jiaxiang,and Jinan seismic stations during the typhoons“Bavi”and“Maysak”in 2020,and“Ampil”in 2018,the solid tide signals related to the typhoons were extracted through filtering.The data is transformed by FFT algorithm to analyze the power spectrum characteristics of the high-frequency signals possibly induced by the typhoons.The results show that the strength of the solid tide is negatively correlated with the distance between the typhoon center and the typhoon station,positively correlated with the central speed,and negatively correlated with the central pressure.The main frequency of gravity disturbance caused by the three typhoons is 0.20-0.25Hz.There is also an energy distribution in the range of 0.001-0.1Hz,with the dominant portion mainly between 0.001-0.05Hz.Through the analysis of signal appearance time and strength,it is believed that the signal in this frequency band may still be mainly affected by the interference of typhoons.

关 键 词：重力固体潮 台风 小波变换 傅里叶变换 

分 类 号：P312.4[天文地球—固体地球物理学]