【摘要】 为了提取中短期地震前兆信息,对福建省2006～2008年数字化形变观测整点值资料进行了二进小波多分辨率分析,结果表明:小波分析结果的细节部分dn主要包含周期为2n～2n+1小时的信号,而近似部分an包含所有周期大于2n+1小时的信号;在此期间,福建省及其邻近地区的中强地震发生前,多数形变观测台站或测项同步接收到了周期大约为21～43 d幅度较大的异常信号,这些信号可能是地震前兆。更多还原

【Abstract】 In order to extract medium-short term earthquake precursor information,we analyzed the hourly digital deformation data in Fujian province from 2006 to 2008 using the binary multiresolution wavelet analysis method.The result shows that:(1) the detailed components dn mainly contain signals with periods of 2n～2n+1 hours and their approximations an contain signals with periods of more than 2n+1 hours;(2) within this study period,the majority of stations or measuring items synchronously received abnormal signals with periods of about 21~43 days before moderate-strong earthquakes in Fujian province and its vicinity.These abnormal signals are possible earthquake precursors.更多还原