Spatial Correlation Anomalies of the Diurnal Variation of the Geomagnetic Vertical Component before the Yingjiang MS6.1 and Ludian MS6.5 Earthquakes |
| |
Authors: | Dai Yong Feng Zhisheng Yang Yanming and Gegen |
| |
Institution: | Earthquake Agency of Inner Mongolia Autonomous Region, Hohhot 010010, China,Jiangsu Earthquake Agency, Nanjing 210014, China,Earthquake Agency of Inner Mongolia Autonomous Region, Hohhot 010010, China and Earthquake Agency of Inner Mongolia Autonomous Region, Hohhot 010010, China |
| |
Abstract: | Significant anomalies were observed at the geomagnetic stations in the southwest region of China before the Yingjiang MS6.1 earthquake and the Ludian MS6.5 earthquake in 2014. We processed the geomagnetic vertical component diurnal variation data by the spatial correlation method. The results show that during the period from April 1 to May 20, 2014,there existed quasi-synchronous decrease changes in the coefficient curves between the five geomagnetic stations of Guiyang,Hechi,Nanshan,Muli,Yongning and Xinyi and Hongshan stations.Furthermore,there was a high gradient zone in the normalized correlation coefficient contour map with background values removed. The epicenters of the Yingjiang MS6.1 earthquake and the Ludian MS6.5 earthquake are located in the gradient zone or near the gradient zone. |
| |
Keywords: | Yingjiang MS6 1 earthquake Ludian MS6 5 earthquake Geomagnetism Vertical component Abnormal variation |
本文献已被 CNKI 等数据库收录! |
| 点击此处可从《中国地震研究》浏览原始摘要信息 |
| 点击此处可从《中国地震研究》下载免费的PDF全文 |
|