摘要
应用地磁特征线法,计算通海台自1995年至2007年H、Z分量的地磁特征线的斜率K和特征线的相关系数C。通过对K与C的变化特征与邻区中强地震的对应关系研究,得到当通海台特征线参数K≤-0.0975和K≥-0.0106为异常,异常出现0～2月内将发生较强地震,其概率为93.8%;异常形态与云南地区的地震有很好的区域对应关系。震例分析表明,用特征线法提取的震磁异常对于地震的短临跟踪有很好的应用前景。
Using the method of geomagnetism feature line, the slope K of the geomagnetism features line of H,Z weight from 1995 to 2007 at Tonghai Station and the correlated coefficient C of features line are calculated. According to the study on the corresponding relations between the variations features of K and C and the moderate earthquakes in neighborhood, we can know that it is magnetic anomalies when the parameter K≤-0. 0975 and K≥-0. 0106. If the abnormal phenomenon appears and lasts from zero to two months, a stronger earthquake will take place. The probability is 93.8 percent. There is a good regional corresponding relationship between the abnormal formation and earthquake that took place in Yunnan area. Analyzing examples of earthquake shows that seismic-magnetic anomalies extracted with geomagnetic features line method has a good useful future in short-term earthquake monitor.
出处
《地震地磁观测与研究》
2008年第6期6-16,共11页
Seismological and Geomagnetic Observation and Research
基金
中国地震局三结合课题资助项目
关键词
地磁
异常变化
地震预报
云南地区
geomagnetic, abnormal variations, earthquake forecast, Yunnan area
