【摘要】 使用琼中地磁台、肇庆地磁台2004—2006年的高精度数字化地磁观测资料,采用地磁短周期转换函数研究方法,系统地分析了琼中、肇庆地磁台周边地区在此期间的地磁异常和地震的对应关系。研究结果表明,在2004年9月17日阳江M_L 5.2地震前,琼中、肇庆地磁台的地磁短周期转换函数A、B,有比较明显的前兆异常。更多还原

【Abstract】 In this article, the geomagnetic data from the Qiongzhong and Zhaoqing geomagnetic observatories during 2004 to 2006 are studied with a geomagnetic short period transfer function algorithm, in order to finding the relationship between the geomagnetic abnormal and seismicity. The study shows that before the Yangjiang Earthquake on September 17, 2004, there is apparent abnormal precursor in geomagnetic short period transfer function A, B of Qiongzhong and Zhaoqing geomagnetic observatories.更多还原