基于EMD的中国大陆强震活动特征分析

Analysis on Characteristics of Strong Earthquake Activity in Chinese Mainland Based on Empirical Mode Decomposition (EMD) Method

利用EMD方法对中国大陆年度最大地震时间序列进行逐级分解,得到5个本征模态函数(IMF)项和1个趋势项,分析了各个IMF分量不同的周期成分同地球自转速度变化、太阳黑子活动和潮汐运动等环境因子之间的相关关系,初步探讨了各个IMF分量的物理机理及其对中国大陆地震活动的影响。

The time series of annual maximum earthquakes in Chinese mainland was decomposed systematically based on Empirical Mode Decomposition （EMD） method, the five Intrinsic Mode Function （IMF） components and the trend component were obtained. The correlation was analyzed between the different period factors of the IMF and the environment factors such as the variation of the earth rotation, the sunspot activity, and tidal motion and so on. The physical mechanism of earthquake activity in Chinese mainland was the IMF components and its impact on the preliminarily discussed.