潮汐形变资料中地震前兆信息的识别与提取  

IDENTIFICATION AND EXTRACTION OF EARTHQUAKE PRECURSOR FROM TIDAL DEFORMATION DATA

作　　者：张燕[1] 吴云[1] 刘永启[2] 褚永海[2] 施顺英[1] 

机构地区：[1]中国地震局地震研究所,武汉430071 [2]武汉大学,武汉430072

出　　处：《大地测量与地球动力学》2003年第4期34-39,共6页Journal of Geodesy and Geodynamics

基　　金：国家自然基金课题 ( 4 0 0 740 2 4)

摘　　要：将小波变换的多分辨率分析引入潮汐形变资料处理中 ,对近年来云南地区的 3次强震前的潮汐形变观测资料进行了处理与分析 ,发现在地震前 2～ 5个月 ,震中附近的形变台站都接收到一个频段相同的异常信号 ,且它们之间是相关的 ,相关系数达 80 %以上 ,由此可以确定信号是由同一个源发出来的。出现在多个台站的相同频段的异常信号很可能就是我们想要得到的地震前兆信息。In this paper, we apply the multiresolution wavelet transformation to process tidal deformation data. By analyzing the three earthquakes which occurred in Yunnan province it is found that in about 2 to 5 months before a strong earthquake some abnormal signals which have the same frequency were recorded at the stations near the epicenters and the signals have correlation coefficients of 80% up. We can ensure that these signals were emitted by the same source which is likely hypocenter and they may be earthquake precursors.

关 键 词：潮汐 形变资料 地震前兆 信息识别 多分辨率分析 

分 类 号：P315.725[天文地球—地震学]