【摘要】 对云南地区地磁观测资料进行分析研究,总结了1986～2002年以来云南地磁场变化形态与异常特征。利用均方差、斜率、拟合等方法分析研究,以日均值为基础建立了一系列判定指标,获得发生在云南及邻区一些地震的震磁前兆信息。研究结果表明,云南地磁观测震前出现以下几种特征:1 短临加速变化异常;2 多台准同步异常;3 有一定形态过程的异常;4 破年变趋势异常。地磁异常以短临显示为多数,中期向短期过渡异常不明显。更多还原

【Abstract】 Geo-magnetism observation data from 1986 to 2002 in Yunnan Province are analyzed.The change status and the character of observation data are summarized.We use indexes to judge the abnormal status of geo-magnetic mean of horizontal and vertical components.Based on the judging indexes, we predicted following earthquakes limited in Seismological Bureau of Yunnan Province:Ninglang M 6.2 Earthquake on 19 November 1998,Yaoan M 6.5 Earthquake on 15 January 2000 and Jiangchuan M 5.1 Earthquake on 15 July 2001.更多还原