用小波法研究台湾省两次7．6级大震前后仑坪台的地磁变化  

Wavelet analysis results for the geomagnetic variations of the Lunping observatory before and after two strong earthquakes

作　　者：陈伯舫 

机构地区：[1]中国香港元朗怡丰花园B座26楼3室

出　　处：《地震地磁观测与研究》2006年第1期45-48,共4页Seismological and Geomagnetic Observation and Research

摘　　要：用小波法分析了台湾省两次Ms 7．6大震(1986年花莲大震和1999年集集大震)前后仑坪台的地磁变化。从小波分析得出的“日变幅差”变化看,两次大地震前一个月内都有异常变化,花莲地震前出现负异常,集集地震前出现正异常。The geomagnetic data recorded at Lunping observatory before and after two great earthquakes, 1986 Hualian earthquake and 1999 Chi-Chi earthquake, were analyzed using the wavelet transform technique. The results indicate that the amplitudes of the diurnal variations＇, derived from the wavelet transform, appear to be anomalous during one month before the main shocks. Before the Hualian earthquake there is a negative anomalous change, and before the Chi-Chi earthquake there is a positive change.

关 键 词：小波变换分析 1986年台湾省花莲大地震 1999年台湾省集集大地震 

分 类 号：P318.5[天文地球—固体地球物理学]