【摘要】 利用2012~2014年南北地震带3期流动地磁矢量测量的准确可靠资料,计算得到了2012~2013年和2013~2014年相邻期岩石圈磁场的分布。分析结果表明,2014年8月3日鲁甸6.5级地震、8月17日永善5.0级地震前,川滇交界东部均存在岩石圈磁场的异常变化。同时,异常持续时间、空间范围与震级大小有一定关系,鲁甸地震前岩石圈磁场异常持续时间长、空间范围广,而永善地震则反之。更多还原

【Abstract】 By using the accurate and reliable three-phases mobile geomagnetic vector observation data in the northsouth seismic belt during 2012 and 2014,we had got the distribution of the lithosphere magnetic field in the adjacent phases from 2012 to 2013 and from 2013 to 2014. The analysis results showed that there were the anomalous change of the lithosphere magnetic field before Ludian M6. 5 earthquake on Aug. 3 and Yongshan M5. 0earthquake on Aug. 17 in 2014 in the eastern part at the junction of Sichuan and Yunnan. At the same time,we considered that there is a certain relationship between anomalous duration or spatial extension and magnitude.The anomalous of lithosphere magnetic field occurred over a large area and lasted for a long time before Ludian M6. 5 earthquake,conversely,it occurred over a small area and lasted for a short time before the Yongshan M5. 0 earthquake.更多还原