摘要
本文使用天文学数据处理中常用的Ｖｏｎｄｒａｋ平滑滤波法，对库尔勒短水准和呼图壁断层形变资料进行了高通、低通和带通数字滤波处理。结果表明，处理后的资料突出了地震前不同周期的地壳形变异常信息，降低了背景噪声和观测误差的影响。该方法对于识别形变异常有较好的效果。
The common Vondrak smoothing filtering method,used in astronomy data handling,was adopt-ed here to deal with the two groups of fixed point horizontal and vertical crust deformation data bymeans of high-pass,low-pass and band-pass digital filterings,respectively.The results showed thatafter handling the data,the abnormal informations of crustal deformation for different periods prior tothe shocks were obviously and the effects of background noise and observing error were reduced aswell.It also indicated that the method is of a better capability for recognized the abnormal of pre-earthquake deformation.
出处
《西北地震学报》
CSCD
1994年第1期52-57,共6页
Northwestern Seismological Journal
基金
地震科学联合基金
关键词
地震前兆
滤波法
地变形
数据分析
Vondrak smoothing method
Fixed point crustal deformation
Digital signal filtering
Abnormal of crustal deformation
