通过子波变换分析宫崎大震前后鹿屋台地磁垂直分量的变化  

Anomalous changes in geomagnetic vertical component of the Kanoya Observatory before and after the Miyazaki great earthquake—A wavelet analysis result

作　　者：陈伯舫[1,2] 

机构地区：[1]中国地震局地球物理研究所,中国北京100081 [2]中国香港香港大学物理系

出　　处：《地震地磁观测与研究》2000年第1期33-36,共4页Seismological and Geomagnetic Observation and Research

摘　　要：1996年10月19日日本九州宫崎发生71级地震,震中离鹿屋地磁台约90km。作者将子波变换后的鹿屋与武汉(或成都)台的Z时均值资料进行比较,发现临震前后的“日变幅差”有异常存在。A great earthquake of M S=7 1 occurred on October 19,1996 near the Kanoya Observatory in Kyushu,Japan.The distance between the epicenter and the Kanoya Observatory is about 90 km.The hourly data of the Kanoya and Wuhan(or Chengdu) Observatories were analysed using the wavelet transform technique.The results indicate that′the amplitudes of the diurnal variations,which are obtained from the wavelet transform,for the Kanoya Observatory appear to be anomalous before and after the earthquake occurrence.

关 键 词：子波变换 地磁日变化 震磁效应 宫崎大地震 地震 

分 类 号：P315.721[天文地球—地震学]