摘要
借助Matlab平台,采用功率谱密度估计方法和傅里叶谱,分析2012年4月11日苏门答腊8.6级地震引起的地球自由振荡和2012年第5号台风"泰利"的卓越频率等特征。结果显示:厦门台和福州台能监测到地球自由振荡信号的基频振型;漳州台和福州台监测到的台风的卓越频率约为0.25 Hz。
With the help of the Matlab platform, the Earth＇ s free oscillations caused by the Ms8.6 Sumatra earthquake on April 11,2012 and the predominant frequency of typhoon Talim of No. 5 in 2012 are analyzed by the power spectral density estimation and Fourier spectrum. The results show that Xiamen and Fuzhou stations monitored the baseband modes in free oscillation signals, while Zhangzhou and Fuzhou stations monitored the typhoon with predominant frequency about 0.25 Hz.
出处
《大地测量与地球动力学》
CSCD
北大核心
2013年第A01期53-56,共4页
Journal of Geodesy and Geodynamics
基金
福建省防震减灾"十一五"重点项目
关键词
连续重力观测
地球自由振荡
功率谱密度估计
卓越频率
台风
continuous gravity observation
Earth＇ s free oscillation
power spectral density estimation
predominant frequency
typhoon
